RTF malware analysis — malicious · bb6579d9037b3e62

MALICIOUS

RTF

633.2 KB

MD5: 5ced02b6db76b207e58e985129c0dc87 SHA-1: 51488adccf2dda4c1537004246949b37fde4a9c7 SHA-256: bb6579d9037b3e6274aa4716d1885ece8a55c6b9af83d6c7705b0d6c958ecb4b

62 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF file contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to execute embedded content. A suspicious extracted artifact, objdata_00_off00000044.bin, was identified. The lack of document body text or scripts makes it difficult to determine the exact payload, but the OLE activation strongly suggests a downloader or exploit delivery mechanism.

Heuristics 3

\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 1 \objdata section(s) — embedded OLE objects
Suspicious extracted artifact info 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000044.bin` `ad0bc0577eb8ab3ad2c22de17d2c28c3ec853ab8b66e90273ca506ad198e84c1`	rtf-objdata-decoded	RTF \objdata at offset 0x44	324080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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