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

Static analysis result for SHA-256 73bf20af21a2f6b1…

MALICIOUS

Office (OOXML) / .DOC

379.5 KB Created: 2022-08-04 08:11:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-08-05
MD5: 6b1dac0a7bef9d97adb6c83673041672 SHA-1: 5d4b2ebfdbdbe462046f5544072e63d2b0a3ec1d SHA-256: 73bf20af21a2f6b15e3c701dc2235cd55d573922f98a92a8e487eeca2474dadd
84 Risk Score

Malware Insights

MITRE ATT&CK
T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The file is a malicious OOXML document containing an embedded OLE object. This object is flagged as a risky file package that drops an auto-executable payload, specifically identified as a JAR file. The presence of these elements strongly suggests the document's purpose is to deliver and execute a secondary malicious payload.

Heuristics 4

  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
f3e6fdd4104e74084a3bb37d60eb257926803cc9034f78953451452c8a8eb6b2		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 251904 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin
0d9069aef474afbb97d4e63e8c99c5ee433471fd29610259a0f1e63c7f1b9268		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 247166 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
emf_00.emf
15dc3ef5b79ed42b93c90cbd0634dc4811e3ff851f16e935008a5ff47a8088ce		 ooxml-emf OOXML EMF part: word/media/image3.emf 5464 bytes

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