Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 739ad5dd096c1f18…

MALICIOUS

Office (OLE)

200.5 KB
MD5: 791f04e9c9635eab7af9195196478266 SHA-1: b8a61a088d003aa2a370b92f785d76576e057b43 SHA-256: 739ad5dd096c1f18dcfb8500431b0ee3538463a6e9a1938cdb176ddf6c64a2bc
140 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a malicious Microsoft Word document that exploits CVE-2006-6456, a vulnerability related to malformed table SPRM data. This exploit allows for arbitrary code execution on the victim's machine. No further stages or IOCs were identified in the static analysis.

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.
  • PEB access via FS segment (x86) high SC_PEB_ACCESS
    PEB access via FS segment (x86)
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 205,265 bytes but its declared streams total only 94,801 bytes — 110,464 bytes (54%) 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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