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

Static analysis result for SHA-256 4175e79340d82a74…

MALICIOUS

Office (OLE) / .RTF

147.7 KB Created: 2001-12-14 14:26:00 Authoring application: Microsoft Word 9.0
MD5: 7b23b29f85eae7bb4fa4d2169d7eb1fa SHA-1: 4dd73af3d9601f59bebc4658270025ab7064323d SHA-256: 4175e79340d82a740756047d29f4ab098bfc9a96e57453291ef8ea58dd4873af
142 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The file is identified as malicious due to the presence of an appended executable payload and a critical heuristic firing for CVE-2006-6456, a known Microsoft Word vulnerability. The document body contains heavily obfuscated and unreadable data, suggesting it is not intended for direct user interaction but rather to trigger the exploit. No VBA macros were extractable, but the combination of the appended payload and the specific CVE exploit indicates a likely delivery mechanism for a secondary stage.

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 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.
  • 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.