Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 d2118140ef684b7b…

MALICIOUS

Office (OLE) / .DOC

1018.5 KB First seen: 2026-05-26
MD5: 25dd87571e02bb8e74c73f40922db3bf SHA-1: 9c5f616e2df0a26c012abee5fe81ac69374a744d SHA-256: d2118140ef684b7ba0eda6a1198b69c1cc05358dc24e7e47cbfb67ebc62ff879
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is a Microsoft Word document containing an embedded Equation Editor OLE object, which is a known vector for exploiting the Equation Editor vulnerability (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the document is opened. No scripts were extracted, and the document body was truncated, limiting further analysis of the payload.

Heuristics 2

  • Equation Editor Ole10Native payload — CVE-2017-11882 critical CVE likely CVE_2017_11882_EQUATION_OLE10NATIVE
    An embedded Microsoft Equation 3.0 object (CLSID 0002CE02-0000-0000-C000-000000000046) carries an Ole10Native packager stream instead of the normal Equation Native/MTEF data. This is the weaponized Equation Editor RCE delivery shape used by CVE-2017-11882 / CVE-2018-0802 maldocs. The payload (font-record overflow + shellcode) is frequently encrypted and the stream name case-scrambled to evade scanners, but an Equation object holding an Ole10Native stream has no benign use.
  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Contains Equation Editor object — related to CVE-2017-11882 / CVE-2018-0802 exploitation, but CLSID presence alone is not the malformed MTEF exploit primitive.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ole10native_00.bin ole-package OLE Ole10Native stream: oLe10NATiVe 1032320 bytes
SHA-256: 5c65cb4591d43cd5ca830b92d2e7261c72e21b1155db755b57e01eb64c3b4295

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