Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 afe54c942061afb9…

MALICIOUS

Office (OOXML)

22.7 KB Created: 2013-02-09 12:58:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-03-18
MD5: a02cbcfba1d7543e26dfb123e132615a SHA-1: b6d521c42ba603cde31fd0eee416d91658da4a02 SHA-256: afe54c942061afb9b5c2a796f44ea239431a21919c25c534f0ce8ab8bf197437
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1134.001 Access Token Manipulation: Token Impersonation/Theft

The file is a malicious Microsoft Office document containing an embedded OLE object with indicators of a dropped executable payload. This strongly suggests exploitation of a vulnerability like CVE-2026-21514 to achieve code execution upon opening. The embedded OLE object is the primary indicator of compromise.

Heuristics 4

  • OOXML Ole10Native with payload/link indicators — possible CVE-2026-21514 high CVE likely CVE_2026_21514
    Office document contains embedded OLE (word/embeddings/oleObject1.bin) with Ole10Native plus executable, PE, or risky remote-link indicators. This is a likely CVE-2026-21514 exploitation shape.
  • Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 24064 bytes
SHA-256: b78d25c7a6a245156451d124531bbd249fdba20b7b38e2a3c09e5bd56910d2d5
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 20792 bytes
SHA-256: a9d1dedc99fc62957f902c07fcf24976edeab4054e67ca42b982c036559ad685
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5012 bytes
SHA-256: b2c8a797c65d85abd4b125c58d74c1d70d4efe987db48a0f62f2c488c86b3a6b

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