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

Static analysis result for SHA-256 63cee29780f51db5…

MALICIOUS

Office (OLE) / .DOC

833.0 KB Created: 2007-12-03 01:19:00 Authoring application: Microsoft Word 9.0
MD5: 1ca8a00bd62535b9a3fe554a0b8ea339 SHA-1: 99ddec79118a388064ed5469ac4dc1c990f33714 SHA-256: 63cee29780f51db5a6186dacdd57006eada9ac214d21fcdbf27f0c79ddee7378
142 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The presence of a NOP sled and XOR-encoded strings indicates a packed or obfuscated payload, likely intended to exploit a vulnerability. The XOR key 0x95 was identified, but the exact nature of the exploit or the second-stage payload could not be determined from the available evidence. No benign URLs were found to be associated with malicious activity.

Heuristics 4

  • XOR-encoded strings (key 0x95) critical SC_XOR_ENCODED
    Found 2 Windows library/API name(s) XOR-encoded with single-byte key 0x95: 'LoadLibraryA', 'GetProcAddress'
  • NOP sled detected high SC_NOP_SLED
    Found 20+ consecutive 0x90 bytes
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 852,992 bytes but its declared streams total only 16,486 bytes — 836,506 bytes (98%) 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).
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.apple.com/DTDs/PropertyList-1.0.dtd
    • http://ns.adobe.com/xap/1.0/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/photoshop/1.0/
    • http://www.microsoft.com

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