Office (OLE) / .DOCX malware analysis — malicious · 3a42d565cc18af8b

MALICIOUS

Office (OLE) / .DOCX

265.0 KB Created: 2020-10-28 13:40:00 Authoring application: Microsoft Office Word

MD5: b04a0f00f5c8c50fb0844c8b2f4de33d SHA-1: ce74836e4879ec52d4bbca66c6391b299c630735 SHA-256: 3a42d565cc18af8b48926bccb2b06179f7e6210c0e2cfe4e313c2bb86f81e682

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains VBA macros, specifically a Document_Open auto-exec macro, which is a strong indicator of malicious intent. The presence of CreateObject calls and the ClamAV detection as 'Doc.Downloader.Generic' further support this. The macro likely attempts to download and execute a second-stage payload, a common technique for malware delivery. The document body content is heavily obfuscated and does not provide clear user-facing text, but the macro behavior is indicative of a 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` `04f0b14197f396c9b03f7b934599b1b01d62a486cd3090375b867094895917c9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	18531 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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