Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 4292cf27d23a63c6…

MALICIOUS

Office (OLE)

154.5 KB Created: 2005-04-20 08:19:00 Authoring application: Microsoft Word 11.1
MD5: d78b2986defc24ab25d1a03f8718a4b0 SHA-1: 4effe832d5ff07c12480ba17e72fd1a076a6d83f SHA-256: 4292cf27d23a63c69f8a016f6de5bc4cae286b23557ef5009cdd4dbb1cd8bb3f
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious Microsoft Word document containing VBA macros, specifically triggering a Document_Open macro. The critical OLE_VBA_SHELL heuristic indicates that the macro attempts to execute external commands. While the document body appears to be a legitimate-looking announcement for sports courses, the presence of the Shell() call and the ClamAV detection as 'Doc.Trojan.Marker-43' strongly suggest that the macro is designed to download and execute a second-stage payload. No specific family could be identified, but the attack pattern is consistent with macro-based malware delivery.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-43 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-43
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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://ns.adobe.com/iX/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
94f436fcd4699c8f7ef6f400cca5372fbe0fd93182ff9c2f5b41cf0f384383fc		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1809 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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