Office (OLE) / .DOC malware analysis — malicious · 533aac672d8b5bf7

MALICIOUS

Office (OLE) / .DOC

1.07 MB Created: 2021-05-20 10:13:00 Authoring application: Microsoft Office Word

MD5: 5c8a1beaef7e504654fefcfe369a2009 SHA-1: 739e47e3bc81523c9451b6ff398a28288544d65a SHA-256: 533aac672d8b5bf749eb282b985765fec5f5fd5c2e4b5c27935b7f3d2dfbc9cc

522 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample is a malicious OLE document containing VBA macros. The 'Document_Open' macro triggers the execution of an embedded PE executable using the Shell() function. This indicates a downloader or droppper pattern, aiming to execute a secondary payload. No document body text was available for further contextual analysis.

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` `46bab7e50db81e146abaa93630a2c1c83964aa095ddfc33425a121433c8f70eb`	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` `c7f139aa82693dc32c7a3d47f93e559d8b675f37c21150268ba3a84caaec48e5`	ole-package	OLE Ole10Native stream: ObjectPool/_1682985591/Ole10Native	505626 bytes

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