Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8892f6201d26d96a…

MALICIOUS

Office (OLE)

173.3 KB Created: 2001-12-14 14:26:00 Authoring application: Microsoft Word 9.0
MD5: cf7c59966be05eefd327901cc196850d SHA-1: 1c87796e5a1aa34b199865d5302aed82360d401d SHA-256: 8892f6201d26d96a88825ad60b422b65deac91b5f5240f34dd310f391feb5375
140 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a Microsoft Word document exhibiting characteristics of an appended executable payload and a critical vulnerability (CVE-2006-6456) related to malformed table structures. This indicates the file is designed to exploit this vulnerability upon opening, likely delivered as a spearphishing attachment, to achieve code execution.

Heuristics 3

  • CVE-2006-6456 — Microsoft Word malformed table SPRM critical CVE exact CVE_2006_6456
    WordDocument contains a malformed table border-color SPRM in the CVE-2006-6456 shape: a valid table-SPRM cluster is followed by an invalid high-byte 0xFF SPRM where Word expects a normal sprmTBrc*Cv record. Vulnerable Word 2000/2002/2003 parsers corrupt memory while handling this malformed data structure.
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 177,412 bytes but its declared streams total only 94,801 bytes — 82,611 bytes (47%) 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.

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