Office (OLE) malware analysis — malicious · 1415d31291d0e40b

MALICIOUS

Office (OLE)

144.5 KB Created: 2015-07-27 16:30:00 Authoring application: Microsoft Office Word First seen: 2019-03-10

MD5: 40b0be6029d17d9056382046cb44a046 SHA-1: afbdd21698542c3e490c96bfd6e222805f82d58e SHA-256: 1415d31291d0e40b0f03ca089aff98a2a622732fc2927028f8c7f4bbaef218e7

222 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is an Office document containing an embedded PE executable and an Ole10Native object, indicating it is designed to drop and execute a payload. Heuristics for WinExec and VirtualAlloc APIs suggest the dropped executable will likely perform system-level operations. The presence of an embedded executable strongly suggests a malicious intent to deliver a secondary stage payload.

Heuristics 6

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
Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
Reference to WinExec API high SC_STR_WINEXEC

Reference to WinExec API
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
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 In document text (OLE body)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_0001662e.exe`	embedded-pe	Office MZ+PE at offset 0x1662E	56274 bytes
SHA-256: `f63b35d774543dae0e20a753e2fa1cb82615784e5e46b90765efc9ef4e2789cf`
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_979485558/Ole10Native	41580 bytes
SHA-256: `ce7d305f6faad5a19b03654aa6f1792e995da2eae7bfe2bdf54b19a1c573be2e`

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