Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b98ed6a71c93bc37…

MALICIOUS

RTF / .DOC

385.3 KB
MD5: 01621af96ebf2a36c65419d6f00d6043 SHA-1: 2ab18231a84b26547a7b59798fb4e2e7fb8c2ef2 SHA-256: b98ed6a71c93bc3722112643bea2bbe8767e016d807e0463266ee2fd47ad9e80
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 object is automatically activated upon opening, which is a common technique for delivering malicious payloads. The presence of an extracted file, objdata_00_off000005da.bin, further supports this. The document body appears to be a list of part numbers and quantities, likely a lure to disguise the malicious nature of the file.

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_off000005da.bin
e1aab6c6277f62895c85aab528bca6528b11d33f68e6710a017535f2b4b70322
rtf-objdata-decoded RTF \objdata at offset 0x5DA 196398 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.