Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0b631c63100db4c8…

MALICIOUS

Office (OOXML)

23.1 KB First seen: 2021-05-26
MD5: b601eb3aac29ddc0cb0c03ee2e2e50e4 SHA-1: a3cd423484f1b50abe620ef0f5051b2a13287800 SHA-256: 0b631c63100db4c84108868fddf561050aa77e06bb35997e9e059a4c498fcaa6
82 Risk Score

Malware Insights

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

The OOXML_ALTCHUNK_OPAQUE heuristic indicates the document attempts to import unrecognised content, a common technique for loading malicious payloads. The presence of external relationships and embedded URLs pointing to www.doctricant.com further supports this, suggesting the document acts as a downloader for a second-stage exploit or malware. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Remote image (web beacon / tracking pixel) medium OOXML_IMAGE_BEACON
    Document references an external image URL — loads automatically on open, revealing IP address and timestamp to the server (used for phishing tracking and NTLM hash theft on corporate networks)
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: https://www.doctricant.com/eur?id=eWUvLy91K0pVZ0krdjZ1TjJmUllUVUZoZDBubUkreTY1SCtnd3FoS2ZyV0JsZCtOL0hXK2hmQ2llTTJ4bWNGSG
  • 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 https://www.doctricant.com/eur?id=eWUvLy91K0pVZ0krdjZ1TjJmUllUVUZoZDBubUkreTY1SCtnd3FoS2ZyV0JsZCtOL0hXK2hmQ2llTTJ4bWNGSG5MSDNpdGN4eDFQQmgyV3BZeXRvSDV3aGpLYXlTeHJBUHNwYWJJZ1c0NmFoeDJQVjkydnhmZUlOUGgyVHNRaEVrQ3VjSlNwQ1I5WlhkS3NBOC9nZ2w2REJGeUllNjVPTkJsWGR0bnU2WVlDU0g1bVpxSUFlSnE0dm9DV3h6TklUQ2tISVNNaW In document text (OOXML body / shared strings)
    • https://www.doctricant.com/eur?id=eWUvLy91K0pVZ0krdjZ1TjJmUllUVUZoZDBubUkreTY1SCtnd3FoS2ZyV0JsZCtOL0hXK2hmQ2llTTJ4bWNGSGOOXML external relationship
    • https://www.doctricant.com/eur?id=eWUvLy91K0pVZ0krdjZ1TjJmUllUVUZoZDBubUkreTY1SCtnd3FoS2ZyV0JsZCtOL0hXK2hmQ2llTTJ4bWNGSG5MSDNpdGN4eDFQQmgyV3BZeXRvSDV3aGpLYXlTeHJBUHNwYWJJZ1c0NmFoeDJQVjkydnhmZUlOUGgyVHOOXML external relationship
    • http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
    • http://purl.org/dc/terms/In document text (OOXML body / shared strings)
    • http://www.w3.org/2001/XMLSchema-instanceIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/metadata/core-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocumentIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-propertiesIn document text (OOXML body / shared strings)

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