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

Static analysis result for SHA-256 dfd515cd5996210b…

MALICIOUS

Office (OLE) / .DOC

1.06 MB Created: 2012-11-23 04:35:00 Authoring application: Microsoft Office Word
MD5: 02b8ba227266dfcefb5958f7dd2fbeaf SHA-1: 5dd79bfa71118e9dec11ff65d37dfa0254e6c536 SHA-256: dfd515cd5996210bcea4b7732db0251358eed055c76acf2672cfaeeaa039887a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File

The file is a malicious OLE document that exploits CVE-2012-1856 in MSCOMCTL.Toolbar. It contains a large slack space and an appended executable payload, indicating it's designed to download and execute a secondary stage. The presence of a NOP sled further supports the exploitation of a buffer overflow vulnerability.

Heuristics 6

  • MSCOMCTL.Toolbar — CVE-2012-0158 / CVE-2012-1856 high CVE likely CVE_2012_1856
    MSCOMCTL.Toolbar — CVE-2012-0158 / CVE-2012-1856
  • ClamAV: Doc.Exploit.Agent-1388627 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.Agent-1388627
  • 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 1,116,709 bytes but its declared streams total only 20,824 bytes — 1,095,885 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).
  • 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.
  • 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://schemas.openxmlformats.org/drawingml/2006/main

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