RTF / .DOC malware analysis — malicious · 2ba5487668103c62

MALICIOUS

RTF / .DOC

308.5 KB

MD5: 24b278ba3af768022928d579bca68329 SHA-1: 5d94eda6ec2a54b8013416cad6e7f738af82925f SHA-256: 2ba5487668103c62614cfb4288d1c26a8d5172352b3b34363618c8c91c810818

140 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1059.001 PowerShell

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of ".objupdate" and Composite Monikers, suggesting an attempt to trigger OLE activation and execute embedded code. One of the extracted artifacts, objdata_00_off000007ce.bin, is flagged as a suspicious extracted artifact with signals related to script execution. The attack pattern likely involves exploiting these OLE features to deliver a malicious payload.

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_off000007ce.bin` `c7e3eb966958d9eb6b40e95965045b4708296a978f60c20f6c42f5424856e3a9`	rtf-objdata-decoded	RTF \objdata at offset 0x7CE	60520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off0001f425.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x1F425	2632 bytes
`objdata_02_off000209c8.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x209C8	12297 bytes

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