Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a93e2feb4fef7049…

MALICIOUS

RTF / .DOC

572.6 KB
MD5: b1e1ce33c04dddcdc62fcf43b905e52f SHA-1: 1e056fb495ebf4665ea01e8f8bde4c94814426d4 SHA-256: a93e2feb4fef7049c5c8a9db75f1f7fb104edae2744a0ee72c8baec2b037c1c7
129 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 exploiting vulnerabilities or delivering malicious payloads. The presence of a suspicious extracted artifact further supports this. Without a document body or script content, the exact nature of the payload cannot be determined, but the overall pattern points to a malicious OLE object execution.

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_off000014ff.bin
39a900a3490572ddd4327f563ddabe432b06baddba0869fc977b5b8018360909
rtf-objdata-decoded RTF \objdata at offset 0x14FF 129088 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.