RTF / .DOC malware analysis — malicious · 7d35d2dc34fb2250

MALICIOUS

RTF / .DOC

368.4 KB

MD5: a6b2e3c82d54e9f70561edfc55a035f3 SHA-1: 72aa1ab3c9ffb5930701b55dfa248e33c17cd7a3 SHA-256: 7d35d2dc34fb22505657c228734d574a07c2bc3e2ba9812f23638cfffe799e75

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model

The RTF document contains multiple indicators of OLE object manipulation, including ".objdata", ".objemb", ".objautlink", and ".objupdate" control words. The presence of ".objupdate" strongly suggests an attempt to exploit the Equation Editor vulnerability (CVE-2017-8570 or similar), which automatically spawns the vulnerable process upon document opening. The heuristic "SE_ENABLE_LURE" further indicates a social engineering attempt to bypass macro security settings. No specific malware family could be identified, and no external IOCs were extracted.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\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 4 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000965.bin` `10fc7a40d5e05117ad220dc7b657c851a4ebe7bbfd621a56d6c3fdc91b35010b`	rtf-objdata-decoded	RTF \objdata at offset 0x965	76400 bytes
`objdata_01_off00007114.bin` `c5b9f58a964116c151c4e0fbc214ec47d0d06f6d4f2ea996b1c9c498bffd5ff4`	rtf-objdata-decoded	RTF \objdata at offset 0x7114	76373 bytes
`objdata_02_off0002de3d.bin` `a8e170497da15decc11753d202c99c86f7a7ffd2d52481e6b9c79a5403675379`	rtf-objdata-decoded	RTF \objdata at offset 0x2DE3D	2632 bytes
`objdata_03_off0002f3e0.bin` `e8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7`	rtf-objdata-decoded	RTF \objdata at offset 0x2F3E0	12297 bytes

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