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

Static analysis result for SHA-256 35108b7e0f8219f2…

MALICIOUS

Office (OLE) / .DOC

164.5 KB
MD5: 9d71cba006753c38a42b2449e34321eb SHA-1: 448d8a8e8c63fdb9a01d81dd541b464609d1045f SHA-256: 35108b7e0f8219f2675ad6c1245d245601373a7b324cd75e4c82c82bdf4155d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The file is an OLE document with significant slack space, indicating it might be packed or contain hidden data. Heuristics detected references to LoadLibrary and GetProcAddress APIs, commonly used by malware to load additional modules. A NOP sled was also observed. The document body contains references to embedded objects like Excel and PowerPoint, which could be used to deliver malicious payloads.

Heuristics 4

  • NOP sled detected high SC_NOP_SLED
    Found 20+ consecutive 0x90 bytes
  • Reference to LoadLibrary API high SC_STR_LOADLIBRARY
    Reference to LoadLibrary API
  • Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
    Reference to GetProcAddress API
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 168,452 bytes but its declared streams total only 31,351 bytes — 137,101 bytes (81%) 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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