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

Static analysis result for SHA-256 48003aaf10e02b72…

MALICIOUS

Office (OOXML) / .DOC

183.4 KB Created: 2020-12-12 17:13:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 07227b3e316e4fdabafabad79c1081af SHA-1: 2f44760f767e4857fc8762d485261853b66b047e SHA-256: 48003aaf10e02b7225375101b435efc4b7fdda39adc15845843815209c8445fc
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The presence of a 'Document_Open' macro and a 'CreateObject' call, combined with ClamAV detection as a downloader, strongly indicates malicious intent. The VBA macro likely executes to download and run a secondary payload from an external source, although no specific URLs were extracted from the document body or scripts. The file is classified as a downloader based on these indicators.

Heuristics 6

  • ClamAV: Doc.Downloader.87f88707f007f878-OOXML-9981544-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.87f88707f007f878-OOXML-9981544-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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.
  • 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.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.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/2016/wordml/cid
    • 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
e97ffc83ed564046a6e6727a276d463e66c64f677e9ec408dd35f277ecc0cd4e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2169 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
18bd533991f7bd00ae083b975f6d5bce64660c54d9f6b41b2900ba347ec19d6a		 vba-project OOXML VBA project: word/vbaProject.bin 95232 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.

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