Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b96801489ccb5477…

MALICIOUS

Office (OLE)

71.1 KB First seen: 2019-05-16
MD5: ee99d6a6bd5f218d8507bfaaa096c988 SHA-1: 05a4109bbee21a6ee7d71e73d54e37bf74890af5 SHA-256: b96801489ccb5477de41f52437fbf3f98788ae1a7ac33f1f5665ffbe8528549e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The presence of a legacy WordBasic AutoOpen macro and significant OLE slack space strongly suggests this document is designed to execute malicious code upon opening. ClamAV detection as 'Doc.Dropper.Agent-6592777-0' further confirms its malicious nature as a dropper.

Heuristics 4

  • ClamAV: Doc.Dropper.Agent-6592777-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6592777-0
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 72,842 bytes but its declared streams total only 35,901 bytes — 36,941 bytes (51%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • 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.
  • 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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