RTF malware analysis — malicious · 178af14c3e2df4b4

MALICIOUS

RTF

8.2 KB First seen: 2019-06-27

MD5: 85792c69dea203ef84f0af02a484b126 SHA-1: 7d5d37c66def06caff8295ac4408c8863f1735c5 SHA-256: 178af14c3e2df4b4a04ba2e42b16116d7d7346aacba15ee96052cd2aa66977a2

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The file is an RTF document containing embedded OLE object data, specifically triggering heuristics related to Microsoft Equation Editor and OLE activation. ClamAV identifies this as Rtf.Exploit.CVE_2017_11882-6584355-1, indicating exploitation of a known vulnerability. This technique allows for arbitrary code execution on the victim's machine.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off0000003c.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3C	4158 bytes
SHA-256: `5930d10b889ab8829ce3fb5663361fbbd7bf4399d521d7f0a6d929638647680d`

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