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

Static analysis result for SHA-256 71ba916a7f35fe66…

MALICIOUS

Office (OOXML) / .DOC

716.8 KB Created: 2022-03-17 14:01:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2022-07-04
MD5: 9910f4d9dbb05b2d4e4f3919aebdd05a SHA-1: 7ea3e74db1134b44b71909891cc7d8c1f3229f77 SHA-256: 71ba916a7f35fe661cb6affc183f1ce83ee068dbc9a123663f93acf7b5a4263e
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1105 Ingress Tool Transfer

The sample is a malicious OOXML document containing an embedded OLE object that acts as a package payload. This payload is designed to download and execute a secondary executable file, indicated by the 'exe' extension and the 'download-and-execute' heuristic. The exploitation of CVE-2026_21514 is strongly suggested by the presence of Ole10Native with executable indicators.

Heuristics 5

  • 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 payload is a download-and-execute script critical OFFICE_PACKAGE_SCRIPT_DROPPER
    The OLE Package's embedded payload contains a script that hosts a shell (PowerShell/WScript/mshta), fetches a remote resource, and executes it — a download-and-run dropper. Embedding such a script inside an Office document via the Object Packager is a direct user-execution delivery technique (MITRE T1204.002), not a benign attachment.
  • 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.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
24b5d61f12654f2f727c44cac296f135e47e4df287ab71a5bc992b9f3f76a4e9		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 906240 bytes
ooxml_oleobject_00_ole10native_00.bin
ece7de75e8d8458213341518df0fce47235f5e300a7467a93a99d69ea67c24c1		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 896887 bytes
emf_00.emf
30e6c175c9fe6c46940b2e479e2470f7d25b008dfb83f83266cc405f3d45b859		 ooxml-emf OOXML EMF part: word/media/image1.emf 5248 bytes

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