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

Static analysis result for SHA-256 79ffb409ed6230c5…

MALICIOUS

Office (OOXML) / .DOC

251.1 KB Created: 2022-09-11 20:44:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-09-14
MD5: a58959596b1b629943b7667878b6893e SHA-1: 99ba721fecb49c5c6a1eccdb18b93e553393dd83 SHA-256: 79ffb409ed6230c57e62cc03dee44611825ab5dd50ec7d3b3a53e10e2529ebaf
84 Risk Score

Malware Insights

MITRE ATT&CK
T1559 Component Object Model Hijacking T1559.001 Component Object Model Hijacking: DLL Side-Loading

The file is a malicious OOXML document containing an embedded OLE object. This object is flagged as risky because it drops an auto-executable payload, specifically identified as a JAR file. The presence of this embedded object strongly suggests an attempt to deliver a secondary malicious payload upon opening the document.

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
f997706a3439308e81274e78e0d0510da0b8eeb2867bc154ca916410c5dd3baf		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 195072 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin
1698634b8a49a2cb2d0ab35024cb0bd4f59cdbee14452a6c76c4664ba8e0d858		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 190941 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
71364a4a8b9ee8d496fe8148379f4eb5a0a102bb7881d1619fecb2522a4e07c8		 ooxml-emf OOXML EMF part: word/media/image3.emf 5464 bytes

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