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

Static analysis result for SHA-256 21d7b36421b05848…

MALICIOUS

Office (OOXML) / .XLSX

2.80 MB Created: 2025-09-10 01:57:00 UTC Authoring application: Microsoft Excel 15.0300
MD5: 757ea6908dd12b6a300c485050eeed89 SHA-1: 8e691553db70a0c41330afa608ff9668cdf6dfd8 SHA-256: 21d7b36421b05848b4ffdf44e2e5b73ae7f6fe519e9afc958c9b06252f2625cc
100 Risk Score

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/PL.3H9jdRD contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • NOP sled detected high SC_NOP_SLED
    Found 20+ consecutive 0x90 bytes
  • 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
5175819c2c50c53e85aec1eb7596fedd68d7b43155cd9f7906a9930db59b9770		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/PL.3H9jdRD 2857472 bytes
ooxml_oleobject_00_ole10native_00.bin
a58676ccec0905cb7f5e5f35cfef45e6c172b4c7970aa700a2d58d00103977f1		 ole-package OOXML xl/embeddings/PL.3H9jdRD Ole10Native stream: OlE10natIVE 2832567 bytes

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