RTF / .DOC malware analysis — malicious · 9881f1985f91d2f1

MALICIOUS

RTF / .DOC

217.5 KB First seen: 2022-04-14

MD5: 00f7fd0977d3a97c55e36dfefec80af9 SHA-1: 774b615905305f562793d277d5f51fa185f285bc SHA-256: 9881f1985f91d2f1f08dfe1d2d0a5376fdfb07dcedcb68260a413ad7c20264b2

154 Risk Score

Malware Insights

MITRE ATT&CK

T1559.002 Component Object Model and Distributed Component Object Model T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate to force OLE activation. This suggests the document is designed to exploit vulnerabilities related to OLE object handling, likely to execute embedded malicious code. The extracted embedded artifacts, objdata_00_off000007d2.bin, objdata_01_off000087e2.bin, and objdata_02_off00009d85.bin, are the likely payloads or components of the exploit.

Heuristics 5

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.
\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 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off000007d2.bin` `a12a881f11ef76bf496f741a25c9210b8adcdb7bec2e2e08424dc2e4c739aea8`	rtf-objdata-decoded	RTF \objdata at offset 0x7D2	15686 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000087e2.bin` `36dcadcd9dba6c796320cf103eee4d99a0cf65218f74bac40d0f472a6487a1f8`	rtf-objdata-decoded	RTF \objdata at offset 0x87E2	2632 bytes
`objdata_02_off00009d85.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x9D85	12297 bytes

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