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

Static analysis result for SHA-256 f38a56b8dc0e8a58…

MALICIOUS

Office (OLE) / .DOC

2.79 MB Created: 2025-12-15 08:52:00 Authoring application: Microsoft Office Word
MD5: 3a95186019af1943a0ea0f8eb07a288f SHA-1: b7e56f4b31f4fdbe844c3d4a4156f1d0e3b3ea97 SHA-256: f38a56b8dc0e8a581999621eef65ef497f0ac0d35e953bd94335926f00e9464f
400 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample contains VBA macros, specifically a Document_Open macro that utilizes WScript.Shell and CreateObject. This indicates the document is designed to execute arbitrary code upon opening. The ClamAV detection 'Doc.Dropper.HexEncodedEXEHeader-9789587-1' further confirms its malicious nature as a dropper. The primary intent appears to be downloading and executing a second-stage payload, as suggested by the dropper classification and the use of WScript.Shell.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • ClamAV: Doc.Dropper.HexEncodedEXEHeader-9789587-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.HexEncodedEXEHeader-9789587-1
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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.
  • 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/officeDocument/2006/
    • http://schemas.openxmlformats.org/officeDocument/2006/bibliography
    • http://schemas.openxmlformats.org/officeDocument/2006/customXml
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
1ecf124e926b522b95c6055516154ae681efc88dda5e06811fb4e2e32c8fe363		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3821 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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