Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 11f5ae81fef93fa2…

MALICIOUS

Office (OLE)

129.4 KB Created: 2006-01-25 08:30:00 Authoring application: Microsoft Office Word
MD5: d5b62cdbad97348b7fb4efe68f422d2a SHA-1: 5d8cb96df01fc56d1b2f539124f5399596ab0ece SHA-256: 11f5ae81fef93fa2d6882c1b82c2c29bdd75d2b87e0730477a068c9db5ac6b42
82 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an OLE document with a high slack anomaly, suggesting obfuscation or embedded malicious content. A heuristic firing for CreateProcess API indicates an attempt to launch external processes. While no specific URLs or scripts were extracted, the combination of these factors points to a likely exploit attempt to download and execute a second-stage payload.

Heuristics 3

  • Reference to CreateProcess API high SC_STR_CREATEPROCESS
    Reference to CreateProcess API
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 132,512 bytes but its declared streams total only 21,151 bytes — 111,361 bytes (84%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml

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