Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b75d63fb633426e9…

MALICIOUS

RTF / .DOC

76.5 KB
MD5: b892175146405b2deea9e0c32a140ba8 SHA-1: 645ba30e29e7cd28033decca8623a023312c3ba4 SHA-256: b75d63fb633426e9fed2a5b18cd707161159b218fc06d6fb24e9bc56cb1890d8
62 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating it is designed to exploit OLE object activation. This suggests a delivery mechanism for malicious content, likely an embedded executable or script, which is then triggered upon opening. The high-entropy carved artifact further supports the presence of complex, potentially packed, malicious content.

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_off0000006e.bin
7204fa1e01c8e1b1a4fb1a4fdf4208ef3aeed38df04d98f9f7ca3d9fa418ec90
rtf-objdata-decoded RTF \objdata at offset 0x6E 39033 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.