RTF / .DOC malware analysis — malicious · 80071fbb7234239c

MALICIOUS

RTF / .DOC

384.0 KB

MD5: 9a7ea1172bf1250005e0fefce04f604f SHA-1: 3df0782fc6ace41e15ca7c98277c79c128453d10 SHA-256: 80071fbb7234239c46ced3c6f0fd9aa7dbeafe79d7bfeed7993d51a69c4da006

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, with heuristics indicating the use of \objdata and \objupdate, suggesting an attempt to exploit OLE activation. A composite moniker is also present, further indicating a malicious OLE object. The embedded artifacts, such as objdata_00_off000007de.bin, are likely components of the exploit chain. No scripts were extracted, and the document body contained only formatting information, making the OLE object exploitation the primary indicator of malicious activity.

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_off000007de.bin` `5b1aaaabfcb12e299d7301f4296ed727bd3c200611795182fd9b355747473898`	rtf-objdata-decoded	RTF \objdata at offset 0x7DE	97660 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000321f7.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x321F7	2632 bytes
`objdata_02_off0003379a.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x3379A	12297 bytes

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