Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c49c35588f43cbc9…

MALICIOUS

Office (OLE)

124.4 KB Created: 2018-10-03 10:13:00 Authoring application: Microsoft Office Word First seen: 2020-06-01
MD5: 5a88ea0afb87456bb8d30b56fb7fe426 SHA-1: 98737d9dedd695868f62256bcf8982e0fd1476ce SHA-256: c49c35588f43cbc912914ad79e157113fc022cb069486b26c70a448e9a41ffe2
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and contains a legacy WordBasic auto-exec marker (AutoOpen). A high-severity heuristic indicates VBA p-code auto-execution with the 'Shell' token, suggesting the macro attempts to run an external command. The document body is unreadable, but the presence of these indicators strongly points to a macro-based attack.

Heuristics 5

  • ClamAV: Doc.Malware.00536d-6705831-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6705831-0
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Legacy WordBasic auto-exec macro marker medium OLE_LEGACY_WORDBASIC_AUTOEXEC
    OLE Word document contains a legacy WordBasic auto-execution marker such as AutoOpen, but no modern VBA project was recovered and no stronger macro-virus family marker was present. This is analyst-facing evidence for old Word macro execution surface, not a downloader or parser-CVE attribution by itself.
  • Unsupported Office format for VBA extraction info OFFICE_FORMAT_UNSUPPORTED
    olevba could not extract VBA macros (AssertionError); format-agnostic byte-level scans still ran. Likely legacy, encrypted, or malformed OLE/OOXML — re-scanning the same bytes will yield the same outcome.
  • 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 In document text (OLE body)

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