Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4124b50c54faf6d9…

MALICIOUS

RTF / .DOC

935.7 KB
MD5: a7bc5349b610c6e8e621e864112ee26a SHA-1: 3209fc0ff6fa42fd6000dca89e8184d63599a97e SHA-256: 4124b50c54faf6d95a5e8daf01f74d8135ace95fc1886f68537e5c36fee8bab4
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1027 Obfuscated Files or Information

The RTF document contains embedded OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this embedded object is designed to be activated automatically, which is a common technique for delivering malicious payloads. The presence of an extracted file from objdata further supports this. While no specific URLs or scripts were extracted, the mechanism strongly suggests a downloader or exploit delivery.

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.

FilenameKindSourceSize
objdata_00_off00000044.bin
aac6e5c1ac6c129bb570e2718cfe1720df2662f3202cded9f1b2cc1b490f2073
rtf-objdata-decoded RTF \objdata at offset 0x44 478936 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.