Office (OLE) / .DOCX malware analysis — malicious · 7371dcb540c73179

MALICIOUS

Office (OLE) / .DOCX

173.5 KB Created: 2021-01-22 12:16:00 Authoring application: Microsoft Office Word

MD5: 023bb5665452df77421958a027bb36ca SHA-1: 98d32f418c3ccb967b90d756461d11bd22fc1d3c SHA-256: 7371dcb540c73179ced65f5fb2eae7f7b3cda4f46a4e5584deb6874e7ee576b2

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, strongly indicate malicious intent. The presence of a VBA macro in the 'macros.bas' file, combined with the auto-execution heuristic, suggests the macro attempts to download and execute a second-stage payload. The benign URL found is likely a red herring or part of the document's legitimate structure.

Heuristics 7

ClamAV: Doc.Malware.Emodldr-10033989-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10033989-0
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` `57c5fc8ce17815567da52642c52710073a1f26f502815de80b26d094034f9496`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16557 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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