Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 fced04100ff41d36…

MALICIOUS

Office (OOXML)

807.2 KB Created: 2019-09-27 05:17:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-06-01
MD5: 602d4c48ce5db9a75726748849b3693c SHA-1: 7923ab3570c4da990e2576df5225c35f2447a0dd SHA-256: fced04100ff41d365633103af988a8c3750efd44573cb0105588d25c26d4c8d7
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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