Office (OLE) malware analysis — malicious · 8a796ba1f411d1aa

MALICIOUS

Office (OLE)

201.5 KB

MD5: 818be8fb6d8c76901f38ae0cd0776081 SHA-1: c387dee6b4813b162eb387d1543e8912c65f7447 SHA-256: 8a796ba1f411d1aa70aad87415658d21efdbb7efe89542f2096797ce3625590e

440 Risk Score

Malware Insights

MITRE ATT&CK

T1559.001 Component Object Model Hijacking T1027 Obfuscated Files or Information

The file is identified as malicious by ClamAV with the signature Win.Trojan.Ransom-510. Static analysis revealed an embedded PE executable within an OLE object, a common technique for delivering secondary payloads. References to LoadLibrary and GetProcAddress APIs suggest dynamic loading of malicious functions. The presence of an embedded executable and the ClamAV detection strongly indicate a ransomware delivery mechanism.

Heuristics 11

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
PE header (with DOS stub) in hex data critical RTF_MZ_HEX

Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
ClamAV: Win.Trojan.Ransom-510 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Ransom-510
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 LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Package object class high RTF_OBJCLASS_PACKAGE

OLE Package object — can wrap arbitrary files
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
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.microsoft.com/office/word/2003/wordml}}\paperw12240\paperh15840\margl1800\margr1800\margt1440\margb1440\gutter0\ltrsect

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_00002639.exe` `eaa5947d627e4b307461c427840b5c118abf499f6f61b449c25858de77b1f2b7`	embedded-pe	Office MZ+PE at offset 0x2639	196551 bytes
Detection ClamAV: Win.Trojan.Ransom-510 Obfuscation or payload: unlikely
`ole10native_00.bin` `48e73642bee3340802abb97b62ce61ff01be4338cd7f1eee044a75b5625097e8`	ole-package	OLE Ole10Native stream: ITEM000/ObjectPool/_1342959499/Ole10Native	48187 bytes
Detection ClamAV: Win.Trojan.Ransom-510 Obfuscation or payload: unlikely
`objdata_00_off00016c6f.bin` `55e857211545f6fc606662ebc63b662b00a35cef0a54129a54e4039247806ad0`	rtf-objdata-decoded	RTF \objdata at offset 0x16C6F	51966 bytes
Detection ClamAV: Win.Trojan.Ransom-510 Obfuscation or payload: unlikely

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