Office (OLE) / .DOCX malware analysis — malicious · ac100d3e7a498558

MALICIOUS

Office (OLE) / .DOCX

259.4 KB Created: 2020-10-29 09:30:00 Authoring application: Microsoft Office Word

MD5: 2feb4235379f7f16eed781c69761baa2 SHA-1: e6237ec8d4d1710c3bbc6122d7201d287014fc73 SHA-256: ac100d3e7a4985580d980cb7dc26527d01d4166b7bc89405dd21918ae03f7fae

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a malicious Microsoft Office document containing VBA macros. The presence of a Document_Open macro and CreateObject calls indicates that the macro is designed to execute automatically when the document is opened. ClamAV detection as 'Doc.Downloader.Generic' further supports its malicious nature, suggesting it likely downloads and executes a second-stage payload. The document body content is heavily obfuscated and does not provide clear user-facing text.

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` `2c8aded1cc33908777d3554a19067d8f93ed6d8269cc13dcdcff33eca45ebd5f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18919 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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