Office (OOXML) / .DOC malware analysis — malicious · 728cea7506dedca0

MALICIOUS

Office (OOXML) / .DOC

807.4 KB Created: 2022-04-28 09:48:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2022-04-28

MD5: fe0b1f102ca6c8109ef0543c2aff673a SHA-1: e53f0e2a78269ec61535dead57ef59a22223a213 SHA-256: 728cea7506dedca015927017f91c641e1d93029c6446fabfc862546bbe5525ab

244 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample contains an embedded OLE object with indicators for an executable payload, strongly suggesting exploitation of CVE-2026-21514. ClamAV detection of 'Win.Packed.Generickdz-10018859-0' on both the main file and an extracted artifact confirms its malicious nature. The embedded OLE object is designed to drop and execute a secondary payload, likely delivered via spearphishing.

Heuristics 7

OOXML Ole10Native with payload/link indicators — possible CVE-2026-21514 high CVE likely CVE_2026_21514

Office document contains embedded OLE (word/embeddings/oleObject1.bin) with Ole10Native plus executable, PE, or risky remote-link indicators. This is a likely CVE-2026-21514 exploitation shape.
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.
ClamAV: Win.Packed.Generickdz-10018859-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Packed.Generickdz-10018859-0
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.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object
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/markup-compatibility/2006
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `9ba855bca145f199890671d9813cc7a98714d3c3cea273352c2e1a7131aab080`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	961024 bytes
Detection ClamAV: Win.Packed.Generickdz-10018859-0 Obfuscation or payload: likely Carved artifact entropy is 7.48, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00.bin` `b2ff658b600d7471df68288ae67d3dc9b01d726fe04a54bd89e0aa8e7507b6d6`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	951141 bytes
Detection ClamAV: Win.Packed.Generickdz-10018859-0 Obfuscation or payload: likely Carved artifact entropy is 7.53, consistent with packed or encrypted content.
`emf_00.emf` `985a60c464274a05b97e5c524adabe41d7042e57bdd7487f8c7fab74e830e3e5`	ooxml-emf	OOXML EMF part: word/media/image1.emf	5524 bytes

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