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

Static analysis result for SHA-256 902c15cdab0459f9…

MALICIOUS

Office (OOXML) / .DOCX

22.7 KB Created: 2021-03-15 13:26:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: ed76eb774c6db599f8ad50d4489e3c31 SHA-1: 477280c16834df373ff5034ae0ecf0ab28ece601 SHA-256: 902c15cdab0459f9fcabafd664c466331a49fb535f0e199db0dabb8d3d189ce5
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is a DOCX document containing VBA macros, specifically triggering a Document_Open macro. ClamAV detections confirm this is malicious, identifying it as Doc.Macro.APMPKILL-6097118-0. The presence of the Document_Open macro indicates an attempt to automatically execute malicious code when the document is opened, likely to download and execute a second-stage payload.

Heuristics 5

  • ClamAV: Doc.Macro.APMPKILL-6097118-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.APMPKILL-6097118-0
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • 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/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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dbbb8b2eb2d03bf32a18c3cefba42cb473b2b9806a5cc5f203253c9cb28c6f04		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1045 bytes
vbaProject_00.bin
ffda848c01ac6416b70b16e5811a2d7f42c92152f09911ff1dddbba4ea8a1a05		 vba-project OOXML VBA project: word/vbaProject.bin 12288 bytes
Detection
ClamAV: Doc.Macro.APMPKILL-6097118-0
Obfuscation or payload: unlikely

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