Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 108f3b899e99ab5c…

MALICIOUS

Office (OLE)

117.5 KB Created: 2018-10-02 17:12:00 Authoring application: Microsoft Office Word First seen: 2018-10-13
MD5: 3d4ff571aaca4446d39cefa6f8d7d4f1 SHA-1: 5b25cf1187444cb9056ae01ab028559186709d94 SHA-256: 108f3b899e99ab5c5bab2e7dcbe223766dfc8fdf2e8cf6c50d1fd8042e8a6010
84 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a critical heuristic firing. A legacy WordBasic auto-exec macro marker (AutoOpen) was detected, indicating an attempt to execute malicious code upon opening. Although VBA extraction failed, the presence of this marker strongly suggests a macro-based attack. The document body contains obfuscated text, further supporting a malicious intent.

Heuristics 4

  • ClamAV: Doc.Malware.00536d-6705144-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.00536d-6705144-0
  • 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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