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

Static analysis result for SHA-256 fb87bc38265ab7c4…

MALICIOUS

Office (OOXML) / .DOC

188.0 KB Created: 2026-04-14 04:58:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2026-04-15
MD5: d5e57a6ae0b161970f96f1dc6476df35 SHA-1: 96d6006aa38d92918f358ec2d8ef3c02cf588eaa SHA-256: fb87bc38265ab7c46f18e1088d3274ae06ade0eed871c34d4a659461116b6d58
142 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is an OOXML document containing a VBA macro triggered by the Document_Open event. The macro is heavily obfuscated but appears to construct a string and execute it, likely to download and run a second-stage payload. The presence of the 'macros.bas' and 'vbaProject_00.bin' artifacts further confirms the macro-based nature of this malicious document.

Heuristics 5

  • 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.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/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
3623b435835024c62ca60f7ffc2a6e2e35acd13e28ade8686981c71a3d8d96f1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 3115 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
b9d17bbf46e5e345cbb9ce66a98c317d3f97c1324ae699243a03fafeb4a0cb6f		 vba-project OOXML VBA project: word/vbaProject.bin 14336 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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