Office (OLE) / .DOCX malware analysis — malicious · aa0f442cfa98a367

MALICIOUS

Office (OLE) / .DOCX

194.5 KB Created: 2020-09-18 12:16:00 Authoring application: Microsoft Office Word

MD5: 8c1031c36dfb5b117c90520ce241152c SHA-1: df39820ae9e0e7532db1ae325f05fd00aa538f2f SHA-256: aa0f442cfa98a3670375843c5db6e6161fc637ccb4af3e93b80d3e676a7c239f

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.001 PowerShell

The critical ClamAV detection and high-severity heuristics for VBA macros, specifically the Document_Open auto-execution and CreateObject calls, indicate malicious intent. The presence of a VBA macro in the 'macros.bas' file, combined with the auto-execution of code, suggests the document is a downloader. The embedded URL, although marked as benign, is often a component in such attacks. The document body is heavily corrupted and unreadable, providing no further context.

Heuristics 7

ClamAV: Doc.Downloader.Generic-9763532-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9763532-0
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` `ba8241e4388725ade491e6e42da3e5f9cf169555b4f6e61ff9f624691af3445f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	20213 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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