Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 6166d404ec0562e5…

MALICIOUS

Office (OLE) / .DOC

119.4 KB Created: 2005-06-29 18:14:00 Authoring application: Microsoft Word 10.0
MD5: 082be3ea3d9865b05bdeab1ff589a90f SHA-1: 2af966843a454a46fc5362f7d7b82d10f81ed217 SHA-256: 6166d404ec0562e5ec267ab747760cb167820d641542957c0aa6da8d8a0c2439
122 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The sample is an OLE document with a high degree of slack space and an appended payload, indicating the presence of malicious content. Heuristics indicate the use of CreateProcess API, suggesting an attempt to launch an external process. The embedded URL, though benign, is present, and the document body is heavily obfuscated, further supporting the malicious nature. The presence of appended executable-looking bytes and the CreateProcess API firing strongly suggest the document is designed to drop and execute a secondary payload.

Heuristics 4

  • 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 122,272 bytes but its declared streams total only 20,632 bytes — 101,640 bytes (83%) 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).
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
  • 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