Office (OLE) malware analysis — malicious · 0798df9b0fe1a620

MALICIOUS

Office (OLE)

238.0 KB Created: 2018-07-23 14:34:00 Authoring application: Microsoft Office Word First seen: 2019-11-20

MD5: b861ee830b424cf11e768374ec623779 SHA-1: 20c43d43977eed1e6c710f2831e0ca06edd457b5 SHA-256: 0798df9b0fe1a62000596b5732e8f53cea19664221913770379e4204b9278fb1

104 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an OLE document containing an embedded executable file named 'ole10native_00.bin'. Heuristics indicate a potential exploitation of CVE-2026-21514 via Ole10Native, which is known to drop auto-executable payloads. The document body presents itself as a curriculum vitae, likely a lure to entice the user to open the malicious attachment.

Heuristics 4

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.
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.
Suspicious extracted artifact info 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 In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_1593847257/Ole10Native	216665 bytes
SHA-256: `bacb6d991e8cdf037b599747d8b44a8f902181e6ba58b9815462ff4cd29f07b4`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 8.00, consistent with packed or encrypted content.

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