Malicious Office (OOXML) / .DOC — malware analysis report

Heuristics 7

• Embedded Office object carries macros critical OFFICE_EMBEDDED_MACRO_OBJECT
  This document embeds a second Office file that itself contains a VBA macro project or an Excel 4.0 (XLM) macro sheet. Hiding a macro-bearing workbook or document inside another document — frequently under an obfuscated, non-standard part name — is a macro-smuggling technique that defeats scanners which only inspect the outer document's macro storage. No benign authoring workflow stages a hidden macro project this way.
• ClamAV: Xls.Malware.Valyria-10002968-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Xls.Malware.Valyria-10002968-0
• ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
  ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
• External relationship high OOXML_EXTERNAL_REL
  External target in word/_rels/settings.xml.rels: file:///C:\Users\Profex\AppData\Local\Microsoft\Office\16.0\DTS\en-US{C4A2B132-8482-49BE-ABF6-61BF4311DF3C}\{00F06CAE-26
• Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
  One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
• Embedded OLE object medium OOXML_OLE_OBJECT
  Document contains an embedded OLE object
• 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.mediafire.com/file/au4vgvrfmmfj7ka/23.htm/file

  • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
  • http://schemas.microsoft.com/office/drawing/2014/chartex
  • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
  • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
  • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
  • http://schemas.openxmlformats.org/markup-compatibility/2006
  • http://schemas.microsoft.com/office/drawing/2016/ink
  • http://schemas.microsoft.com/office/drawing/2017/model3d
  • http://schemas.microsoft.com/office/2019/extlst
  • http://schemas.openxmlformats.org/officeDocument/2006/relationships
  • http://schemas.openxmlformats.org/officeDocument/2006/math
  • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
  • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
  • http://schemas.openxmlformats.org/wordprocessingml/2006/main
  • http://schemas.microsoft.com/office/word/2010/wordml
  • http://schemas.microsoft.com/office/word/2012/wordml
  • http://schemas.microsoft.com/office/word/2018/wordml/cex
  • http://schemas.microsoft.com/office/word/2016/wordml/cid
  • http://schemas.microsoft.com/office/word/2018/wordml
  • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahash
  • http://schemas.microsoft.com/office/word/2015/wordml/symex
  • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
  • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
  • http://schemas.microsoft.com/office/word/2006/wordml
  • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

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