Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 425a04c275fc4f63…

MALICIOUS

Office (OLE)

56.0 KB Created: 2010-05-21 16:09:00 Authoring application: Microsoft Word 11.5.3
MD5: df80bd982998615b4055296d4fe23314 SHA-1: 4af575872f3edfe7afa0b889c7e150c2d087ea00 SHA-256: 425a04c275fc4f632a8b97bcb1564e01406f3f24b1ddb57a5cdeeb34315cf2ad
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is identified as malicious by ClamAV with multiple critical heuristic firings, including the presence of VBA macros and a Document_Open macro. The Document_Open macro is a common technique for executing malicious code upon opening the document. While the document body contains educational content, the technical indicators strongly suggest it is a lure for a malicious payload, likely a downloader or dropper.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9537b470e4200c2925a3522f2a5b4c2d82050f57063017535e620dc9586bc884		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4296 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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