Office (OLE) / .DOCX malware analysis — malicious · 4a68e284c206b9fe

MALICIOUS

Office (OLE) / .DOCX

901.0 KB Created: 2021-07-06 12:06:00 Authoring application: Microsoft Office Word

MD5: 94bc2648308a61ff0c80f00d485122a6 SHA-1: 9e6709b7553cac06add285c46905cdb4e6be6210 SHA-256: 4a68e284c206b9feb5a81d2235a338195db6982c439d088d357fdfb69630f15b

602 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer T1071.001 Web Protocols T1059.003 Windows Command Shell

The document contains VBA macros, including a Document_Open macro, which is a common technique for executing malicious code upon opening. The script attempts to download and execute a DLL file named 'niberius.dll' into the user's template path. This indicates the intent to establish persistence or download a second-stage payload. The presence of embedded executables and references to process creation APIs further support the malicious nature of this document.

Heuristics 16

Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT

OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514

Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
ClamAV: Win.Trojan.Generic-9876346-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Generic-9876346-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Reference to CreateProcess API high SC_STR_CREATEPROCESS

Reference to CreateProcess API
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
Ole10Native package carries executable/script file type high OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in an executable or script-capable extension. Even without UI extension spoofing, embedding a runnable payload inside an Office document is a high-risk delivery pattern.
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.
Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT

Reference to VirtualProtect API
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Suspicious extracted artifact medium 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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `e71d307f9d10461ac01ffd83b84bd3b183b6ceb16528afc94404f1086c39a1ab`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2990 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`embedded_office_0008ec71.exe` `e341ac6d35df89d0c60edb100ff789af32d10f5fbf9706d7f53e8cdb0e712455`	embedded-pe	Office MZ+PE at offset 0x8EC71	337807 bytes
Detection ClamAV: Win.Trojan.Injectorx-9876306-0 Obfuscation or payload: unlikely
`ole10native_00.bin` `3af52a494f4eeeb4c8949ade01309c5ba0ad0ab98042328ff4aebb8e69a0f43c`	ole-package	OLE Ole10Native stream: ObjectPool/_1687053216/Ole10Native	298805 bytes
Detection ClamAV: Win.Trojan.Generic-9876346-0 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.