Office (OLE) / .DOCX malware analysis — malicious · 21509e892c4ef6e4

MALICIOUS

Office (OLE) / .DOCX

218.0 KB Created: 2020-10-28 16:03:00 Authoring application: Microsoft Office Word

MD5: 8d7f667c5911d8e6c24bcbdbfe56b497 SHA-1: e13f9c603441f701c0ca9a53bb9b69eb5cb071a9 SHA-256: 21509e892c4ef6e47bd2fe0d2290b20e48e4680f2f3537f12a061cd5912b1cac

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The sample is a Microsoft Office document containing a critical ClamAV detection for a downloader. Heuristics indicate the presence of VBA macros, specifically a Document_Open auto-execution macro that uses CreateObject. This suggests the macro is designed to download and execute a second-stage payload. No specific family could be identified, but the behavior is consistent with a generic macro-based downloader.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9785156-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9785156-0
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/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `432b4517275395423e4145d722d6a456d77df175cda38550f4e26528858e8adb`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18870 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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