def unpack(self, data):
parser = RtfObjParser(data)
parser.parse()
width = len(str(len(parser.objects)))
for k, item in enumerate(parser.objects):
item: RtfObject
path = item.filename or F'carve{k:0{width}}.bin'
data = item.rawdata
meta = {}
if item.is_ole:
if item.format_id == OleObject.TYPE_EMBEDDED:
meta['ole_type'] = 'EMBEDDED'
elif item.format_id == OleObject.TYPE_LINKED:
meta['ole_type'] = 'LINKED'
if item.is_package:
meta['src_path'] = item.src_path
meta['tmp_path'] = item.temp_path
if item.clsid is not None:
meta['ole_info'] = item.clsid_desc
meta['ole_guid'] = item.clsid
meta['ole_name'] = item.class_name
if item.oledata:
data = item.oledata
pos = item.rawdata.find(data)
if pos > 0:
meta['raw_header'] = item.rawdata[:pos]
if item.olepkgdata:
data = item.olepkgdata
pos = item.oledata.find(data)
if pos >= 0:
meta['ole_header'] = item.oledata[:pos]
yield UnpackResult(path, data, **meta)
def save_ole_objects(self, data, save_object, filename):
'''
The bulk of this fuction is taken from python-oletools: https://github.com/decalage2/oletools/blob/master/oletools/rtfobj.py
See link for license
'''
rtfp = RtfObjParser(data)
rtfp.parse()
try:
i = int(save_object)
objects = [rtfp.objects[i]]
except Exception as ex:
self.log(
'error',
'The -s option must be followed by an object index, such as "-s 2"\n{ex}'
.format(ex=ex))
return
for rtfobj in objects:
i = objects.index(rtfobj)
tmp = tempfile.NamedTemporaryFile(delete=False)
if rtfobj.is_package:
self.log('info',
'Saving file from OLE Package in object #%d:' % i)
self.log('info', ' Filename = %r' % rtfobj.filename)
self.log('info', ' Source path = %r' % rtfobj.src_path)
self.log('info', ' Temp path = %r' % rtfobj.temp_path)
self.log('info', ' saving to file %s' % tmp.name)
self.log('info', ' md5 %s' % rtfobj.olepkgdata_md5)
tmp.write(rtfobj.olepkgdata)
tmp.close()
# When format_id=TYPE_LINKED, oledata_size=None
elif rtfobj.is_ole and rtfobj.oledata_size is not None:
self.log('info', 'Saving file embedded in OLE object #%d:' % i)
self.log('info', ' format_id = %d' % rtfobj.format_id)
self.log('info', ' class name = %r' % rtfobj.class_name)
self.log('info', ' data size = %d' % rtfobj.oledata_size)
# set a file extension according to the class name:
self.log('info', ' saving to file %s' % tmp.name)
self.log('info', ' md5 %s' % rtfobj.oledata_md5)
tmp.write(rtfobj.oledata)
tmp.close()
else:
self.log('info', 'Saving raw data in object #%d:' % i)
self.log('info', ' saving object to file %s' % tmp.name)
self.log('info', ' md5 %s' % rtfobj.rawdata_md5)
tmp.write(rtfobj.rawdata)
tmp.close()
if not save_object == 'all':
__sessions__.new(tmp.name)
def run(self):
results = {}
rtfobj_results = {}
binary = get_binary(self.job_id)
rtfp = RtfObjParser(binary)
rtfp.parse()
rtfobj_results["ole_objects"] = []
for rtfobj in rtfp.objects:
if rtfobj.is_ole:
class_name = rtfobj.class_name.decode()
ole_dict = {
"format_id": rtfobj.format_id,
"class_name": class_name,
"ole_datasize": rtfobj.oledata_size,
}
if rtfobj.is_package:
ole_dict["is_package"] = True
ole_dict["filename"] = rtfobj.filename
ole_dict["src_path"] = rtfobj.src_path
ole_dict["temp_path"] = rtfobj.temp_path
ole_dict["olepkgdata_md5"] = rtfobj.olepkgdata_md5
else:
ole_dict["ole_md5"] = rtfobj.oledata_md5
if rtfobj.clsid:
ole_dict["clsid_desc"] = rtfobj.clsid_desc
ole_dict["clsid_id"] = rtfobj.clsid
rtfobj_results["ole_objects"].append(ole_dict)
# http://www.kb.cert.org/vuls/id/921560
if class_name == "OLE2Link":
rtfobj_results["exploit_ole2link_vuln"] = True
# https://www.kb.cert.org/vuls/id/421280/
elif class_name.lower() == "equation.3":
rtfobj_results["exploit_equation_editor"] = True
results["rtfobj"] = rtfobj_results
return results
def analyze_objects(self, path):
data = None
with io.open(path, 'rb') as fh:
data = fh.read()
parser = RtfObjParser(data)
parser.parse()
for idx, rtfobj in enumerate(parser.objects):
if rtfobj.is_ole:
if rtfobj.format_id == oleobj.OleObject.TYPE_EMBEDDED:
obj_type = '{} (Embedded)'.format(rtfobj.format_id)
elif rtfobj.format_id == oleobj.OleObject.TYPE_LINKED:
obj_type = '{} (Linked)'.format(rtfobj.format_id)
else:
obj_type = '{} (Unknown)'.format(rtfobj.format_id)
if rtfobj.is_package:
obj_html_class = 'suspicious'
_, ext = os.path.splitext(rtfobj.filename)
if re_executable_extensions.match(ext):
obj_html_class = 'malicious'
else:
obj_html_class = 'info'
try:
if rtfobj.clsid:
obj_clsid = rtfobj.clsid
if rtfobj.clsid_desc:
obj_clsid_desc = rtfobj.clsid_desc
if 'CVE' in obj_clsid_desc:
obj_html_class = 'malicious'
else:
obj_clsid = 'Not available'
obj_clsid_desc = 'No CLSID related description available.'
except AttributeError:
obj_clsid = 'Not available'
obj_clsid_desc = 'No CLSID related description available.'
if 'equation' in str(rtfobj.class_name).lower():
obj_clsid_desc += ' (The class name suggests an Equation Editor referencing OLE object.)'
obj_html_class = 'malicious'
self.add_result_subsection(
'OLE object #{}'.format(idx),
{
'address': '{}'.format(hex(rtfobj.start)),
'class': obj_html_class,
'type': obj_type,
'filename': rtfobj.filename if rtfobj.filename else 'Not available' ,
'classname': str(rtfobj.class_name) if rtfobj.class_name else 'Not available',
'size': rtfobj.oledata_size,
'clsid': obj_clsid,
'clsid_description': obj_clsid_desc,
'source_path': rtfobj.src_path if rtfobj.src_path else 'Not available',
'temp_path': rtfobj.temp_path if rtfobj.temp_path else 'Not available'
}
)
else:
self.add_result_subsection(
'(Non) OLE object #{}'.format(idx),
{
'index': '0x{}'.format(rtfobj.start),
'class': 'info',
'type': 'Not a valid OLE object',
}
)
def run(analyzer_name, job_id, filepath, filename, md5,
additional_config_params):
logger.info("started analyzer {} job_id {}"
"".format(analyzer_name, job_id))
report = general.get_basic_report_template(analyzer_name)
try:
results = {}
rtfobj_results = {}
binary = general.get_binary(job_id)
rtfp = RtfObjParser(binary)
rtfp.parse()
rtfobj_results["ole_objects"] = []
for rtfobj in rtfp.objects:
if rtfobj.is_ole:
class_name = rtfobj.class_name.decode()
ole_dict = {
"format_id": rtfobj.format_id,
"class_name": class_name,
"ole_datasize": rtfobj.oledata_size,
}
if rtfobj.is_package:
ole_dict["is_package"] = True
ole_dict["filename"] = rtfobj.filename
ole_dict["src_path"] = rtfobj.src_path
ole_dict["temp_path"] = rtfobj.temp_path
ole_dict["olepkgdata_md5"] = rtfobj.olepkgdata_md5
else:
ole_dict["ole_md5"] = rtfobj.oledata_md5
if rtfobj.clsid:
ole_dict["clsid_desc"] = rtfobj.clsid_desc
ole_dict["clsid_id"] = rtfobj.clsid
rtfobj_results["ole_objects"].append(ole_dict)
# http://www.kb.cert.org/vuls/id/921560
if class_name == "OLE2Link":
rtfobj_results["exploit_ole2link_vuln"] = True
# https://www.kb.cert.org/vuls/id/421280/
elif class_name.lower() == "equation.3":
rtfobj_results["exploit_equation_editor"] = True
results["rtfobj"] = rtfobj_results
report["report"] = results
except AnalyzerRunException as e:
error_message = (
"job_id:{} analyzer:{} md5:{} filename: {} Analyzer Error {}"
"".format(job_id, analyzer_name, md5, filename, e))
logger.error(error_message)
report["errors"].append(error_message)
report["success"] = False
except Exception as e:
traceback.print_exc()
error_message = (
"job_id:{} analyzer:{} md5:{} filename: {} Unexpected Error {}"
"".format(job_id, analyzer_name, md5, filename, e))
logger.exception(error_message)
report["errors"].append(str(e))
report["success"] = False
else:
report["success"] = True
general.set_report_and_cleanup(job_id, report)
logger.info("ended analyzer {} job_id {}" "".format(analyzer_name, job_id))
return report
def parse_rtf(self, filename, data):
'''
The bulk of this fuction is taken from python-oletools: https://github.com/decalage2/oletools/blob/master/oletools/rtfobj.py
See link for license
'''
self.log('success', 'File: {name} - size: {size} bytes'.format(name=filename, size=hex(len(data))))
table = []
h = ['id', 'index', 'OLE Object']
rtfp = RtfObjParser(data)
rtfp.parse()
for rtfobj in rtfp.objects:
row = []
obj_col = []
if rtfobj.is_ole:
obj_col.append('format_id: {id} '.format(id=rtfobj.format_id))
if rtfobj.format_id == oleobj.OleObject.TYPE_EMBEDDED:
obj_col.append('(Embedded)')
elif rtfobj.format_id == oleobj.OleObject.TYPE_LINKED:
obj_col.append('(Linked)')
else:
obj_col.append('(Unknown)')
obj_col.append('class name: {cls}'.format(cls=rtfobj.class_name))
# if the object is linked and not embedded, data_size=None:
if rtfobj.oledata_size is None:
obj_col.append('data size: N/A')
else:
obj_col.append('data size: %d' % rtfobj.oledata_size)
if rtfobj.is_package:
obj_col.append('OLE Package object:')
obj_col.append('Filename: {name}'.format(name=rtfobj.filename))
obj_col.append('Source path: {path}'.format(path=rtfobj.src_path))
obj_col.append('Temp path = {path}'.format(path=rtfobj.temp_path))
obj_col.append('MD5 = {md5}'.format(md5=rtfobj.olepkgdata_md5))
# check if the file extension is executable:
_, temp_ext = os.path.splitext(rtfobj.temp_path)
self.log('debug', 'Temp path extension: {ext}'.format(ext=temp_ext))
_, file_ext = os.path.splitext(rtfobj.filename)
self.log.debug('File extension: %r' % file_ext)
if temp_ext != file_ext:
obj_col.append("MODIFIED FILE EXTENSION")
else:
obj_col.append('MD5 = {md5}'.format(md5=rtfobj.oledata_md5))
if rtfobj.clsid is not None:
obj_col.append('CLSID: {clsid}'.format(clsid=rtfobj.clsid))
obj_col.append(rtfobj.clsid_desc)
# Detect OLE2Link exploit
# http://www.kb.cert.org/vuls/id/921560
if rtfobj.class_name == b'OLE2Link':
obj_col.append('Possibly an exploit for the OLE2Link vulnerability (VU#921560, CVE-2017-0199)')
# Detect Equation Editor exploit
# https://www.kb.cert.org/vuls/id/421280/
elif rtfobj.class_name.lower() == b'equation.3':
obj_col.append('Possibly an exploit for the Equation Editor vulnerability (VU#421280, CVE-2017-11882)')
else:
obj_col.append('Not a well-formed OLE object')
row.append(rtfp.objects.index(rtfobj))
row.append('%08Xh' % rtfobj.start)
row.append('\n'.join(obj_col))
table.append(row)
self.log('table', dict(rows=table, header=h))
def _parse_rtf(self, data: bytes) -> Dict[str, list]:
results = {}
rtfp = RtfObjParser(data)
rtfp.parse()
save_dir = os.path.join(CUCKOO_ROOT, "storage", "analyses",
self.task_id, "rtf_objects")
if rtfp.objects and not os.path.exists(save_dir):
os.makedirs(save_dir)
for rtfobj in rtfp.objects:
results.setdefault(str(rtfobj.format_id), [])
temp_dict = {
"class_name": "",
"size": "",
"filename": "",
"type_embed": "",
"CVE": "",
"sha256": "",
"index": ""
}
if rtfobj.is_package:
log.debug("Saving file from OLE Package in object #%d:",
rtfobj.format_id)
log.debug(" Filename = %s", rtfobj.filename)
log.debug(" Source path = %s", rtfobj.src_path)
log.debug(" Temp path = %s", rtfobj.temp_path)
sha256 = hashlib.sha256(rtfobj.olepkgdata).hexdigest()
fname = convert_to_printable(
rtfobj.filename) if rtfobj.filename else sha256
log.debug(" Saving to file %s", sha256)
temp_dict["filename"] = fname
with open(os.path.join(save_dir, sha256), "wb") as f:
f.write(rtfobj.olepkgdata)
temp_dict["sha256"] = sha256
temp_dict["size"] = len(rtfobj.olepkgdata)
# temp_dict["source_path"] = convert_to_printable(rtfobj.src_path))
elif rtfobj.is_ole and rtfobj.oledata_size is not None:
ole_object_mapping = {
oleobj.OleObject.TYPE_EMBEDDED: "Embedded",
oleobj.OleObject.TYPE_LINKED: "Linked"
}
temp_dict["type_embed"] = ole_object_mapping.get(
rtfobj.format_id, "Unknown")
if getattr(rtfobj, "clsid",
None) is not None and "CVE" in rtfobj.clsid_desc:
temp_dict["CVE"] = rtfobj.clsid_desc
# Detect OLE2Link exploit
# http://www.kb.cert.org/vuls/id/921560
if rtfobj.class_name == b"OLE2Link":
temp_dict[
"CVE"] = "Possibly an exploit for the OLE2Link vulnerability (VU#921560, CVE-2017-0199)"
log.debug("Saving file embedded in OLE object #%d:",
rtfobj.format_id)
log.debug(" format_id = %d", rtfobj.format_id)
log.debug(" class name = %s", rtfobj.class_name)
log.debug(" data size = %d", rtfobj.oledata_size)
class_name = rtfobj.class_name.decode("ascii",
"ignore").encode("ascii")
temp_dict["class_name"] = convert_to_printable(class_name)
temp_dict["size"] = rtfobj.oledata_size
# set a file extension according to the class name:
class_name = rtfobj.class_name.lower()
if class_name.startswith(b"word"):
ext = "doc"
elif class_name.startswith(b"package"):
ext = "package"
else:
ext = "bin"
sha256 = hashlib.sha256(rtfobj.oledata).hexdigest()
temp_dict["filename"] = f"object_{rtfobj.start:08X}.{ext}"
save_path = os.path.join(save_dir, sha256)
log.debug(" Saving to file %s", sha256)
with open(save_path, "wb") as f:
f.write(rtfobj.oledata)
temp_dict["sha256"] = sha256
else:
log.debug("Saving raw data in object #%d:", rtfobj.format_id)
temp_dict["filename"] = f"object_{rtfobj.start:08X}.raw"
sha256 = hashlib.sha256(rtfobj.rawdata).hexdigest()
save_path = os.path.join(save_dir, sha256)
log.debug(" Saving object to file %s", sha256)
with open(save_path, "wb") as f:
f.write(rtfobj.rawdata)
temp_dict["sha256"] = sha256
temp_dict["size"] = len(rtfobj.rawdata)
temp_dict["index"] = f"{rtfobj.start:08X}h"
results[str(rtfobj.format_id)].append(temp_dict)
return results
def module_rtf(file, md5, tool, args):
has_objects = False
objects_result = 'No embedded objects.'
has_shellcode = False
shellcode_result = 'No shellcode.'
has_ole = False
ole_result = 'No OLE package.'
has_pe = False
pe_result = 'No executable.'
indicators = []
print_output(file, '\n\n-----------------------------------------\n[Scanning for embedded objects in RTF]\n-----------------------------------------\n', 'text')
# Read file for parsing
data = open(filescanner_proc_dir+file, 'rb').read()
rtfp = RtfObjParser(data)
rtfp.parse()
for rtfobj in rtfp.objects:
if rtfobj.is_ole:
print_output(file, '[-] FOUND OLE OBJECT format_id: {} class name: {} size: {}'.format(rtfobj.format_id, rtfobj.class_name, rtfobj.oledata_size), 'shell')
has_objects = True
objects_result = 'EMBEDDED OBJECTS FOUND.'
indicators.append(rtfobj.class_name)
if rtfobj.is_package:
print_output(file, '[-] OLE PACKAGE filename: {} source path: {} temp path: {}'.format(rtfobj.filename, rtfobj.src_path, rtfobj.temp_path), 'shell')
has_ole = True
ole_result = 'OLE PACKAGE'
indicators.append(rtfobj.filename)
# Check if the file extension is executable:
objname, ext = os.path.splitext(rtfobj.filename)
if re_executable_extensions.match(ext):
print_output(file, '[!] EXECUTABLE FILE', 'shell')
has_pe = True
pe_result = 'EXECUTABLE.'
else:
print_output(file, '[-] Not an OLE Package', 'text')
else:
print_output(file, '[-] Not a well-formed OLE object', 'text')
rtfdump_scan(file, '-i -f O')
if filescan.yara_scan(file, md5, tool, args, filescanner_proc_dir):
has_shellcode = True
shellcode_result = 'SHELLCODE FOUND.'
# Determine risk level and overall results
if has_objects == True and (has_ole == True or has_shellcode == True or has_pe == True):
risk = 'High Risk'
elif has_objects == True:
risk = 'Medium Risk'
result = objects_result + ' ' + ole_result + ' ' + shellcode_result + ' ' + pe_result
##
# OUTPUT
##
output[module] = {'result' : result, 'risk' : risk, 'indicators' : indicators }
output[module]['additional_info'] = {'md5' : md5}
return output
def analyze_objects(self, path):
data = None
with io.open(path, "rb") as fh:
data = fh.read()
parser = RtfObjParser(data)
parser.parse()
for idx, rtfobj in enumerate(parser.objects):
if rtfobj.is_ole:
if rtfobj.format_id == oleobj.OleObject.TYPE_EMBEDDED:
obj_type = "{} (Embedded)".format(rtfobj.format_id)
elif rtfobj.format_id == oleobj.OleObject.TYPE_LINKED:
obj_type = "{} (Linked)".format(rtfobj.format_id)
else:
obj_type = "{} (Unknown)".format(rtfobj.format_id)
if rtfobj.is_package:
obj_html_class = "suspicious"
_, ext = os.path.splitext(rtfobj.filename)
if re_executable_extensions.match(ext):
obj_html_class = "malicious"
else:
obj_html_class = "info"
try:
if rtfobj.clsid:
obj_clsid = rtfobj.clsid
if rtfobj.clsid_desc:
obj_clsid_desc = rtfobj.clsid_desc
if "CVE" in obj_clsid_desc:
obj_html_class = "malicious"
else:
obj_clsid = "Not available"
obj_clsid_desc = "No CLSID related description available."
except AttributeError:
obj_clsid = "Not available"
obj_clsid_desc = "No CLSID related description available."
if "equation" in str(rtfobj.class_name).lower():
obj_clsid_desc += " (The class name suggests an Equation Editor referencing OLE object.)"
obj_html_class = "malicious"
self.add_result_subsection(
"OLE object #{}".format(idx),
{
"address":
"{}".format(hex(rtfobj.start)),
"class":
obj_html_class,
"type":
obj_type,
"filename":
rtfobj.filename
if rtfobj.filename else "Not available",
"classname":
str(rtfobj.class_name)
if rtfobj.class_name else "Not available",
"size":
rtfobj.oledata_size,
"clsid":
obj_clsid,
"clsid_description":
obj_clsid_desc,
"source_path":
rtfobj.src_path
if rtfobj.src_path else "Not available",
"temp_path":
rtfobj.temp_path
if rtfobj.temp_path else "Not available",
},
)
else:
self.add_result_subsection(
"(Non) OLE object #{}".format(idx),
{
"index": "0x{}".format(rtfobj.start),
"class": "info",
"type": "Not a valid OLE object",
},
)
def analyze_objects(self, path):
data = None
with io.open(path, 'rb') as fh:
data = fh.read()
parser = RtfObjParser(data)
parser.parse()
for idx, rtfobj in enumerate(parser.objects):
if rtfobj.is_ole:
if rtfobj.format_id == oleobj.OleObject.TYPE_EMBEDDED:
obj_type = '{} (Embedded)'.format(rtfobj.format_id)
elif rtfobj.format_id == oleobj.OleObject.TYPE_LINKED:
obj_type = '{} (Linked)'.format(rtfobj.format_id)
else:
obj_type = '{} (Unknown)'.format(rtfobj.format_id)
if rtfobj.is_package:
obj_html_class = 'suspicious'
_, ext = os.path.splitext(rtfobj.filename)
if re_executable_extensions.match(ext):
obj_html_class = 'malicious'
else:
obj_html_class = 'info'
try:
if rtfobj.clsid:
obj_clsid = rtfobj.clsid
if rtfobj.clsid_desc:
obj_clsid_desc = rtfobj.clsid_desc
if 'CVE' in obj_clsid_desc:
obj_html_class = 'malicious'
else:
obj_clsid = 'Not available'
obj_clsid_desc = 'No CLSID related description available.'
except AttributeError:
obj_clsid = 'Not available'
obj_clsid_desc = 'No CLSID related description available.'
if 'equation' in str(rtfobj.class_name).lower():
obj_clsid_desc += ' (The class name suggests an Equation Editor referencing OLE object.)'
obj_html_class = 'malicious'
self.add_result_subsection(
'OLE object #{}'.format(idx), {
'address':
'{}'.format(hex(rtfobj.start)),
'class':
obj_html_class,
'type':
obj_type,
'filename':
rtfobj.filename
if rtfobj.filename else 'Not available',
'classname':
str(rtfobj.class_name)
if rtfobj.class_name else 'Not available',
'size':
rtfobj.oledata_size,
'clsid':
obj_clsid,
'clsid_description':
obj_clsid_desc,
'source_path':
rtfobj.src_path
if rtfobj.src_path else 'Not available',
'temp_path':
rtfobj.temp_path
if rtfobj.temp_path else 'Not available'
})
else:
self.add_result_subsection(
'(Non) OLE object #{}'.format(idx), {
'index': '0x{}'.format(rtfobj.start),
'class': 'info',
'type': 'Not a valid OLE object',
})
def get_rtf_objects():
with open('/sample', 'rb') as f:
data = f.read()
rtfp = RtfObjParser(data)
rtfp.parse()
out_data = []
tags = []
cve_regex = re.compile(' CVE-(\d{4}-\d+)')
for rtfobj in rtfp.objects:
if rtfobj.is_ole:
tags.append('ole')
ole_column = {'format_id': rtfobj.format_id}
if rtfobj.format_id == oleobj.OleObject.TYPE_EMBEDDED:
ole_column['format_type'] = 'embedded'
elif rtfobj.format_id == oleobj.OleObject.TYPE_LINKED:
ole_column['format_type'] = 'linked'
else:
ole_column['format_type'] = 'unknown'
ole_column['class_name'] = rtfobj.class_name
# if the object is linked and not embedded, data_size=None:
if rtfobj.oledata_size is None:
ole_column['data_size'] = -1
else:
ole_column['data_size'] = rtfobj.oledata_size
if rtfobj.is_package:
ole_column['package'] = {}
ole_column['package']['filename'] = rtfobj.filename
ole_column['package']['source_path'] = rtfobj.src_path
ole_column['package']['temp_path'] = rtfobj.temp_path
# check if the file extension is executable:
_, ext = os.path.splitext(rtfobj.filename)
if re_executable_extensions.match(ext):
ole_column['package']['executable'] = True
# else:
# pkg_column = 'Not an OLE Package'
if rtfobj.clsid is not None:
ole_column['CLSID'] = rtfobj.clsid
ole_column['CLSID_desc'] = rtfobj.clsid_desc
for match in cve_regex.findall(rtfobj.clsid_desc.upper()):
tags.append('cve-{}'.format(match))
# Detect OLE2Link exploit
# http://www.kb.cert.org/vuls/id/921560
if rtfobj.class_name == b'OLE2Link':
ole_column[
'exploits'] = 'Possibly an exploit for the OLE2Link vulnerability (VU#921560, CVE-2017-0199)'
tags.append('cve-2017-0199')
else:
ole_column = {'error': 'Not a well-formed OLE object'}
out_data.append({
'id': rtfp.objects.index(rtfobj),
'index': rtfobj.start,
'ole_object': ole_column
})
return out_data, tags