Office (OLE) / .DOCX malware analysis — malicious · f070d3b141fc03a3

MALICIOUS

Office (OLE) / .DOCX

156.7 KB Created: 2020-09-23 17:49:00 Authoring application: Microsoft Office Word

MD5: f0751654686eeeca7c5f8906b2cdd198 SHA-1: 9efde9ac127d3669292f6b4d289e24f1d8c58b11 SHA-256: f070d3b141fc03a3ef28c6702efe30ea30b00c74265ae2b544fb2b49934a5c67

240 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for OLE_VBA_MACROS, OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC indicate that this document contains VBA macros designed to execute automatically upon opening. The presence of the 'macros.bas' artifact further confirms this. The primary function appears to be downloading and executing a second-stage payload, as suggested by the 'Doc.Downloader' ClamAV signature. The document body content is heavily obfuscated and does not provide clear user-facing text, reinforcing the malicious intent behind the macros.

Heuristics 7

ClamAV: Doc.Downloader.Mryv-9765643-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Mryv-9765643-0
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` `3fdc5dc9fa6dbe05ddbb5394ffbf1a5da353d311eafd75c86ddc522f2b658b58`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19358 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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