Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f157ca85f8ae7378…

MALICIOUS

RTF / .DOC

572.3 KB
MD5: 7b6ab34d7ce4609f9430a61c2e2c389a SHA-1: 0f0d8aeb1d2ceba2a15c1d2afdfac4ab70586785 SHA-256: f157ca85f8ae737857b7f66ac3085e99d587bff15626d302dc416c4855f964df
141 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.001 PowerShell

The RTF document contains OLE object data that is configured to be updated upon opening, indicating an attempt to exploit OLE object handling. This suggests a malicious document designed to execute code when opened by a user. No specific family could be identified, and no further IOCs were extracted.

Heuristics 4

  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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_off0000139f.bin
2d32b0c635f4dac40c6c03fb3b7590a0df96a8892467c11bc6921e3f2494812c
rtf-objdata-decoded RTF \objdata at offset 0x139F 129080 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.