Office (OLE) / .DOCX malware analysis — malicious · cb4aaffb479ed567

MALICIOUS

Office (OLE) / .DOCX

169.0 KB Created: 2021-01-22 16:11:00 Authoring application: Microsoft Office Word

MD5: 8a23452cc6e7422417079b544eb0225c SHA-1: 60e9b03d5e71dea835fa78f0ed262ce97695c78a SHA-256: cb4aaffb479ed567e1cca60bdb16fe0ede6ca520f16b1129e28eae589d6f37f6

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Doc.Malware.Emodldr-10033990-0. Static analysis detected a VBA macro within the document, specifically a Document_Open macro that utilizes CreateObject. This indicates the macro is designed to execute automatically upon opening the document, likely to download and run a secondary payload. The presence of a VBA macro and the auto-execution behavior strongly suggest a macro-based malware delivery mechanism.

Heuristics 7

ClamAV: Doc.Malware.Emodldr-10033990-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10033990-0
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` `5ed4257a756cf59fd0bdd4996a568d11e210a8cb1fd2c78a16a7c0bd2a73f2f9`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16688 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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