Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 9744232ab1984a2b…

MALICIOUS

Office (OOXML) / .XLSX

2.87 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2026-06-09
MD5: 2f225c518f725a6b7eed684f9ef9fa9a SHA-1: 9accdfca670558793431925230184795791d5a03 SHA-256: 9744232ab1984a2b6db0e8d7bb824be40cf87ebe7e9f8abf2de450f5b7dd914f
100 Risk Score

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/iRhY.2v8zSh contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALY
    Embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is an exploit-shaped Equation/OLE payload container seen in malicious OOXML samples. It is not assigned to a specific CVE unless the MTEF/Equation Native primitive also matches.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/iRhY.2v8zSh 2948608 bytes
SHA-256: 070b415f12d00a840c35f1aeb5a8f902db3d0b0ca5d74b880162ba84cc52bb9d
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/iRhY.2v8zSh Ole10Native stream: oLE10NaTivE 2923208 bytes
SHA-256: 99eff2177249901949ddb23a0554f2d5b646d14b3ae8ff60d649166d9e516b92

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