Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 5444f092393b0bd3…

MALICIOUS

Office (OOXML)

2.11 MB Created: 2026-05-11 01:51:49 UTC Authoring application: Microsoft Excel 12.0000
MD5: afedfa05773f549b70eace20b60c6fb1 SHA-1: 69085de56560bfe9f6d0c3c111bf9d1d23da2e2c SHA-256: 5444f092393b0bd323b23a2b813439deb48b916b55d39eb3b4596c9d18e29ad4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates the presence of the CVE-2017-11882 vulnerability within an embedded Equation Editor OLE object. This vulnerability is commonly exploited to achieve arbitrary code execution. The embedded OLE object itself is a key indicator of the attack vector.

Heuristics 3

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/ok.bg0 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
78c6f3f987d02ea274605beec09849d04df3eca5c020898f1474d70ac76c84cc		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/ok.bg0 2939392 bytes

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