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

Static analysis result for SHA-256 79b658a1e0690041…

MALICIOUS

Office (OOXML) / .DOC

267.4 KB Created: 2021-05-08 02:39:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: 70605d0b7fb8476fc06526a7e3b88f79 SHA-1: f9b03fd58f8a44bf702e97b8698ce8bd718cdda5 SHA-256: 79b658a1e069004182b8bb55eb1c18078e491e6d2449853278b53f7d81be860d
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document contains an embedded OLE object which is flagged as a risky file that drops an auto-executable payload, specifically a JAR file. This indicates the document is designed to deliver and execute a secondary stage payload. The presence of the embedded OLE object and the associated extracted artifacts strongly suggest an attempt at initial compromise via a malicious attachment.

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
ec24e77488b5e0f193f9f0542b09d564b4bba6d0837094b97c6cbb3c29571255		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 265216 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
3b6edbda582252d05e780ae9ecaeb61473e0bfe63fd4bcb9030f38708a93ffc7		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 260496 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
e9e5c81b1aeb9f88b7c19f33b08131f0d53f63227e512773de0dac10d5e5e337		 ooxml-emf OOXML EMF part: word/media/image2.emf 5148 bytes

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