Office (OLE) / .DOC malware analysis — malicious · a351f929a0a4eccf

MALICIOUS

Office (OLE) / .DOC

164.5 KB Created: 2021-01-22 08:23:00 Authoring application: Microsoft Office Word

MD5: 735733de812f544b5beaffa2cc8adc6f SHA-1: 4a979e1b300c5f8bc628b56780573dc8ae17aed0 SHA-256: a351f929a0a4eccf68bfeb3cf1dac2e02879bb5b9f3bb44c600b2f5495f3c684

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1140 Deobfuscate or Obfuscate

The sample is a malicious DOC file containing VBA macros. The critical ClamAV heuristic and high-severity heuristics for OLE_VBA_DOCOPEN, OLE_VBA_CREATEOBJ, and OLE_VBA_PCODE_AUTOEXEC_EXEC indicate that the Document_Open macro is designed to execute code, likely by creating objects and running p-code. This strongly suggests the macro's purpose is to download and execute a second-stage payload. The document body content is heavily obfuscated and does not provide clear user-facing text, further supporting a malicious intent.

Heuristics 7

ClamAV: Doc.Malware.Emodldr-10033991-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Malware.Emodldr-10033991-0
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` `3c5958394a8cd574bb5c21698184bd94e0175e4e32453917f72e270419c43f84`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	16775 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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