Office (OOXML) malware analysis — malicious · 94b5beac2c18a827

MALICIOUS

Office (OOXML)

347.4 KB Created: 2019-06-03 08:28:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-11-20

MD5: 84da06c6b53bb24ce8f2f29726045e09 SHA-1: c448ba9194c3b947e5bc8be9988336e49af31f18 SHA-256: 94b5beac2c18a827127e71926777640c4b9d4eef04b476abb5492d406ac67c81

242 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious due to the presence of an embedded OLE object with indicators for a payload or link, strongly suggesting exploitation of CVE-2026-21514. ClamAV detections confirm the presence of a packed executable, Win.Packed.Razy-7660763-0, which is likely the dropped payload. The embedded OLE object is designed to execute this payload upon interaction.

Heuristics 5

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.
ClamAV: Win.Malware.Generic-6987314-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Malware.Generic-6987314-0
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.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an 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.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
- http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
- http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	481792 bytes
SHA-256: `24eab6e05d8dd7e3ac3783172ce4daeeb6276d223597044df72724d6776a955c`
Detection ClamAV: Win.Malware.Generic-6987314-0 Obfuscation or payload: unlikely
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	475484 bytes
SHA-256: `cc69d4474f7940f547d8eba15c1216711ebb5d8c6e7164163e1a9f0a2fa79953`
Detection ClamAV: Win.Malware.Generic-6987314-0 Obfuscation or payload: unlikely
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image1.emf	5480 bytes
SHA-256: `bf12a8e08c98bc64ffd71cf303c6493ecfed4ec608c871d23bbea5e68b5296cc`

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