Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 ed87f1596b2c8c89…

MALICIOUS

Office (OOXML)

873.8 KB Created: 2019-09-27 05:17:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-05-25
MD5: 686a2f37473b9372465a16d6f4b00e68 SHA-1: 61702f3486f5c461ba38311399b203fba6037103 SHA-256: ed87f1596b2c8c8904c0880114dfb997b90411c965695f7ccc2195f125a9d90b
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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