Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b58f4695c0c09868…

MALICIOUS

Office (OLE)

158.1 KB Created: 2001-12-14 14:26:00 Authoring application: Microsoft Word 9.0
MD5: 0ddec113c26f6e2328383445df2682db SHA-1: 66a4f105aef1ec68c5e6817b072727771fad1714 SHA-256: b58f4695c0c098686aa543a623f3a778c05d2a0f949e6081753010eeaca6b466
142 Risk Score

Malware Insights

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

The file is a Microsoft Word document exhibiting characteristics of an appended executable payload and a large slack space anomaly. Crucially, it triggers a critical heuristic for CVE-2006-6456, indicating exploitation of a Microsoft Word malformed table vulnerability. No VBA macros were extractable, but the presence of the exploit suggests the document is designed to deliver a secondary payload upon opening.

Heuristics 4

  • 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 161,909 bytes but its declared streams total only 94,801 bytes — 67,108 bytes (41%) 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.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (PermissionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.

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