Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 86e0b2cb958604a6…

MALICIOUS

Office (OOXML)

814.7 KB Created: 2019-09-27 05:17:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-05-25
MD5: d2f99a4107259a40003b03ea1bc3ee03 SHA-1: b76d3e794bf52e97cd38433784e89695af0e9908 SHA-256: 86e0b2cb958604a6aca7dac5246d2adc086ba047c5eef0d791bd0c94641ec914
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Doc.Dropper.Agent-6427474-0. A critical heuristic firing indicates the presence of an embedded OLE object that imports unrecognised content, suggesting it acts as a dropper. The document's structure and the nature of the heuristic strongly suggest it's designed to deliver a secondary payload.

Heuristics 3

  • ClamAV: Doc.Dropper.Agent-6427474-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6427474-0
  • altChunk imports unrecognised content high OOXML_ALTCHUNK_OPAQUE
    altChunk relationship resolves to a packaged part whose content does not match a known chunk format. Treat with suspicion — altChunk is rarely used outside RTF/HTML smuggling.
  • 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/markup-compatibility/2006 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

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