RTF / .DOC malware analysis — malicious · 8a33dfbb3427f09c

MALICIOUS

RTF / .DOC

383.7 KB

MD5: 623168c36d3ded3a5797d7de54f89a36 SHA-1: dccefe700ca6567dd2781344934616426f46f09f SHA-256: 8a33dfbb3427f09cff3337e1feda1f1e83713c1cd211869d985d233d2ab70364

140 Risk Score

Malware Insights

MITRE ATT&CK

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

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate, strongly suggesting an attempt to exploit OLE activation for malicious purposes. The presence of composite monikers further supports this. No document body text or scripts were extracted, limiting the ability to determine the exact payload or delivery mechanism.

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_off000007d1.bin` `e61987e4250210891e07079d80eb39c6ea437795f3d4fed25bb0ae2e982ccfb1`	rtf-objdata-decoded	RTF \objdata at offset 0x7D1	97527 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000320d6.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x320D6	2632 bytes
`objdata_02_off00033679.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x33679	12297 bytes

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