Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 503594f2610bd51d…

MALICIOUS

Office (OLE)

126.5 KB Created: 2007-01-25 15:54:00 Authoring application: Microsoft Word 11.5.3
MD5: 816f837c20ae220cb15fe08b7394f26b SHA-1: e2478b254a4bb1fccff5b954296d9ea960727112 SHA-256: 503594f2610bd51d80574fdd5ea6d33713cb3e4832485f00eab0ae99f3ea4184
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The sample is a malicious Office document containing VBA macros. A critical heuristic indicates the use of the Shell() function, which is commonly used to execute arbitrary commands or download and run additional payloads. The presence of 'macros.bas' further confirms the macro-based nature of the threat. While specific IOCs beyond the macro filename are limited, the technique strongly suggests a downloader or initial access vector.

Heuristics 6

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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.
  • 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/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://www.iec.ch

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d2c75fd4a15a40347b656baf522d764bf337c5fa864602f5f23ffb30f986816c		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 5908 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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