Office (OOXML) / .XLSX malware analysis — malicious · 8e39ed8071b7456c

MALICIOUS

Office (OOXML) / .XLSX

2.22 MB Created: 2025-08-28 00:09:56 UTC Authoring application: Microsoft Excel 12.0000

MD5: 5a68b0583720d9b26e06c6a1cbe89e05 SHA-1: df473eeb09ff59891cc69a6ddd7e36d902564af0 SHA-256: 8e39ed8071b7456c1ab39fe1c0662da0ba15161c34b883b10a6e888613850059

80 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. It also contains a heuristic firing indicating a lure to enable macros or editing, a common tactic for malware droppers. The embedded OLE object is likely a payload or exploit, but its specific nature cannot be determined from the provided evidence.

Heuristics 3

Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR

Embedded OLE object xl/embeddings/jR.zRDtVeX contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
Embedded OLE object medium OOXML_OLE_OBJECT

Document contains an embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `04d909b98399bcb1377440a1a5c6cf5e86066ffc07091dd27eb287bc518c0e8c`	ooxml-ole-object	OOXML embedded OLE part: xl/embeddings/jR.zRDtVeX	3061760 bytes

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