Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 582ec352e57e2390…

MALICIOUS

Office (OOXML)

50.1 KB Created: 2021-07-23 10:39:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: dbd97132cb0d2a5b374d3f3eb6d2a6fb SHA-1: 2ce71fe8931ae5fedc6d0dbdc90fe2446d6ee599 SHA-256: 582ec352e57e239045311e09f91b2a209debc9c6f6bef346a16e48bfb5b0ebc4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1137.001 Software Deployment: DLL Side-Loading

The sample is a malicious Office document containing an embedded OLE object. Heuristics indicate this object is likely an executable payload, exploiting CVE-2026-21514. This suggests the document is designed to deliver and execute a secondary stage payload upon opening.

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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2012/wordml
    • http://schemas.microsoft.com/office/word/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahash
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • 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
0b2a852a70d85b73d62e099f4b03b1be460e0925f4bbde73ec9c9ff17fe5b947		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 61952 bytes
ooxml_oleobject_00_ole10native_00.bin
ec158179a13579e3a841cbe4dfa60c7d5eff50cf97f191c742595ddce85af793		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 59381 bytes
emf_00.emf
8c137a49cd432fc15aa4aa1e43d8f2d19788a0345b1e385eb3c54dd854130928		 ooxml-emf OOXML EMF part: word/media/image1.emf 5496 bytes

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