Office (OLE) / .DOC malware analysis — malicious · d43ec0226fd6af4d

MALICIOUS

Office (OLE) / .DOC

1.07 MB Created: 2021-05-20 10:18:00 Authoring application: Microsoft Office Word

MD5: 632c214b5a3f8bdfa91197e121f41db1 SHA-1: 9744884a328416906de484acbe1200a83cb7b5fa SHA-256: d43ec0226fd6af4d0848cd1fa2329b93fb73341814dd8536c53b6da0e31b3844

522 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1027 Obfuscated Files or Information T1059.001 PowerShell

The sample contains a Document_Open VBA macro that uses Shell() to execute an embedded PE executable. This indicates a malicious document designed to download and run a secondary payload. The presence of OLE_EPRINT_EMF_OBJECT and OLE_EMBEDDED_EXE heuristics further supports the exploitation of OLE vulnerabilities for code execution.

Heuristics 14

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.
Shell() call in VBA critical OLE_VBA_SHELL

Shell() call in VBA
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
PEB access via FS segment (x86) high SC_PEB_ACCESS

PEB access via FS segment (x86)
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
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.
Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT

Reference to VirtualProtect API
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 — context-specific rules above attribute URLs they actually evaluated; this rule lists URLs that were present in the bytes but were not otherwise tied to a specific finding.

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` `83e5bb7b78842e6cc089e78ca70aa1b0bdc97d050ffbeac6ac77bd23552833de`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1491 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s). Carved macro source contains an auto-exec entry point and execution/download terms.
`embedded_office_0008f068.exe` `18854c0d4ca123a92028f3589b34e59b810e2122f191b404c919aa28e33a7dad`	embedded-pe	Office MZ+PE at offset 0x8F068	531864 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`ole10native_00.bin` `257d96822d1e9a18081230e5bb386df8f8872c88cd47c445b5cd305500e3c688`	ole-package	OLE Ole10Native stream: ObjectPool/_1682986207/Ole10Native	505626 bytes

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