Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 491ed03db3da39e3…

MALICIOUS

Office (OOXML)

7.7 KB Created: 2018-03-07 09:39:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2021-06-20
MD5: 1806027433a56c8e8afce4eec98a1f30 SHA-1: d7adf15f4a970cf0cfa70909cc12a4e3f24040ce SHA-256: 491ed03db3da39e3193c776611e4996304f6c39fc9ba10e151856a765a557eb0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample exhibits characteristics of a malicious document downloader, specifically triggering heuristics for remote template injection and external relationships. The embedded URL, http://bit.do/fQKsy, is highly suspicious and likely serves as the initial point for downloading a secondary payload. The ClamAV detection as 'Doc.Downloader.Redline-9972754-0' further supports this assessment, indicating a known downloader pattern.

Heuristics 4

  • ClamAV: Doc.Downloader.Redline-9972754-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Redline-9972754-0
  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (http://bit.do/fQKsy) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/webSettings.xml.rels: http://bit.do/fQKsy
  • 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://bit.do/fQKsy Remote template reference
    • http://schemas.openxmlformats.org/markup-compatibility/2006In 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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