Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b732a5ddca466ef5…

MALICIOUS

Office (OLE)

133.9 KB Created: 2018-10-03 18:57:00 Authoring application: Microsoft Office Word First seen: 2019-01-20
MD5: e7800da451eb0b114a554f7ad824bd77 SHA-1: 31f49440e67448b603422b04f0a7fb78f2adcd55 SHA-256: b732a5ddca466ef59b56b2e3834c68facf443362c17fe44cae44e3e3747c15c6
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 the signature Doc.Downloader.Sload-6794075-0, indicating a downloader. The presence of a legacy WordBasic auto-exec marker (AutoOpen) suggests an attempt to automatically run malicious code upon opening. Although VBA macros could not be extracted, the downloader nature and the auto-exec marker point towards an attack pattern involving the execution of a secondary payload, likely initiated via a macro.

Heuristics 4

  • ClamAV: Doc.Downloader.Sload-6794075-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Sload-6794075-0
  • 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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