MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File
The sample is a Microsoft Word document exhibiting OLE slack anomalies and an appended executable payload. It specifically triggers the CVE-2006-6456 heuristic, indicating exploitation of a malformed table SPRM vulnerability. This suggests the document is designed to exploit this known flaw to achieve code execution.
Heuristics 3
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CVE-2006-6456 — Microsoft Word malformed table SPRM critical CVE exact CVE_2006_6456WordDocument 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.
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 163,089 bytes but its declared streams total only 94,801 bytes — 68,288 bytes (42%) 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).
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OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOADOLE 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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