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

Static analysis result for SHA-256 8c491ff716a5b1fc…

MALICIOUS

Office (OOXML) / .DOCM

74.4 KB Created: 2025-12-17 20:45:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2025-12-18
MD5: c4503a69698140d64ffba8ff2ea7de82 SHA-1: 98ee66dc417e415fd059b0de961f8fd3c4b2eb31 SHA-256: 8c491ff716a5b1fca672bc23db6308d080bc3aba37f7b217364f7e1a2b9e8d7c
442 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is a DOCM file containing a Document_Open VBA macro that utilizes WScript.Shell and CreateObject to download a PowerShell script from 'https://cloud-storage.art/doc/Y1.ps1'. The script is saved to 'C:\Temp\Y1.ps1' and then executed using PowerShell. This indicates a downloader pattern designed to fetch and run a second-stage payload.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • ClamAV: Doc.Downloader.Pwshell-10001336-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Pwshell-10001336-0
  • 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
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — 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 https://cloud-storage.art/doc/Y1.ps1
    • 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/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
834c75a054935552428302ffe994acea2e8cc0f26178d276a668b72a4464cd4b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1381 bytes
vbaProject_00.bin
68eb318c481147a567d5cd971cbb4df19cb253fdb2bd515e59637f1d2bb02936		 vba-project OOXML VBA project: word/vbaProject.bin 15872 bytes
Detection
ClamAV: Doc.Downloader.Pwshell-10001336-0
Obfuscation or payload: unlikely

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