Office (OOXML) malware analysis — malicious · 5a5d287aa98ac541

MALICIOUS

Office (OOXML)

20.7 KB Created: 2017-03-25 22:55:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2021-07-10

MD5: f90c5af26c92a728607036eb3eb6f171 SHA-1: 997a17115f85f2434c442492b39f60f5282bf35e SHA-256: 5a5d287aa98ac54115e9bfb26c84d3abf5bfe55bf966cc986fd088719ad11e7f

122 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains an embedded OLE object with indicators of a dropped executable payload, specifically noting a '.vbs' extension. This strongly suggests an attempt to exploit a vulnerability like CVE-2026-21514 for client execution. The embedded OLE object and the likely dropped Visual Basic script point towards a macro-based attack vector.

Heuristics 4

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 high 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 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	51200 bytes
SHA-256: `002b1b834d840dfe85b54c68d693366aa7b843a21acbaf01cc3de90eb32b71a1`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): Wscript.SCRIPTFULLNAME, 1)
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	48289 bytes
SHA-256: `aa5d3af5a7c6245a7988be5396c64111ebd87394fedc73fe3f951941d2d0e8f4`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis recovered command string(s): Wscript.SCRIPTFULLNAME, 1)
`emf_00.emf`	ooxml-emf	OOXML EMF part: word/media/image1.emf	7616 bytes
SHA-256: `11fc492965a57b40582444d6d3383098f356af9aadad2d00426bf155c9037cc3`

Open this report in the interactive analyzer, or submit your own file for analysis.