Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 675ebd1764659ff7…

MALICIOUS

Office (OOXML)

45.4 KB Created: 2017-02-01 22:32:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2020-05-25
MD5: 98987fea777522f208924ecdef9d1aca SHA-1: 0c79d19a9430fa1bee3a3b4fe5460631040c818d SHA-256: 675ebd1764659ff72bf39016b03207aef9328447566ac881083b25984a04e33c
122 Risk Score

Malware Insights

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

The sample is a malicious OOXML document containing an embedded OLE object. Heuristics indicate this object is likely an exploit for CVE-2026-21514 and is designed to drop an auto-executable payload, specifically identified as a .vbs file. This suggests a spearphishing attachment delivery vector leading to client execution via a Visual Basic script.

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 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 8704 bytes
SHA-256: cb7a03b33488a8bf79a669b9c926296cd6e5081ca0e91ce5292613b26610de41
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 6113 bytes
SHA-256: b489b78529e794af3767ab8c58ec03f83f9b3a81fe7adaa5cbadb1ae395ce61f
emf_00.emf ooxml-emf OOXML EMF part: word/media/image3.emf 5388 bytes
SHA-256: 2f097fa222cd0b7e509306a9b887aa0a011bd74ba45fb2b4108a35ee66aea946
emf_01.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5356 bytes
SHA-256: 3b0d4b9502588729e99f938068b730104717bf73d577b8db067bdb6b0aff9954
emf_02.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5388 bytes
SHA-256: e7e451e29a7647079022f30c03657b09d2e334f07badf56f1f430b8180713586

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