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

Static analysis result for SHA-256 2c95cffd77484dd3…

MALICIOUS

Office (OLE) / .RTF

148.4 KB Created: 2001-12-14 14:26:00 Authoring application: Microsoft Word 9.0
MD5: 94b5775af2c1a3828b9355295cb36efd SHA-1: 7b84b12558f9583d6c5cc26610d967c61dd3a415 SHA-256: 2c95cffd77484dd34f9c1e5fb623523451a95fc71bdc00e9f9974680278ba497
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is identified as malicious due to the critical heuristic firing for CVE-2006-6456, indicating exploitation of a Microsoft Word malformed table SPRM vulnerability. The OLE_OBJECTPOOL_CONTAINER_DISGUISED_RTF heuristic further suggests a disguised RTF file containing an ObjectPool. No VBA macros were extractable, but the presence of these critical vulnerabilities points to an exploit attempting to gain 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 ObjectPool in file named RTF high OLE_OBJECTPOOL_CONTAINER_DISGUISED_RTF
    File is an OLE compound document named .rtf and contains ObjectPool embedded-object storage, suggesting a disguised Word/OLE container with embedded object attack surface.
  • 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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