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

Static analysis result for SHA-256 7099cdd24bb1eb0d…

MALICIOUS

Office (OOXML) / .DOC

13.6 KB Created: 2018-12-27 23:03:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: a9cdfe72ad619da4fed37718a3e23a9b SHA-1: 2301507200f88d8ed1d1860c36bbf5347c47af1a SHA-256: 7099cdd24bb1eb0dbe3ab1bc1995e3e5cf577b2d232e088d948c8ff749b73795
182 Risk Score

Malware Insights

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

The sample contains an embedded OLE object with indicators for CVE-2026-21514 exploitation. This object's payload is identified as a download-and-execute script, specifically a VBScript, which fetches a second-stage payload from http://kasperskylab.ignorelist.com:9999/Testing. This indicates a malicious document designed to exploit a vulnerability and download further malicious content.

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/2012/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
    • http://kasperskylab.ignorelist.com:9999/Testing

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
a3c7e537c8d6866de2040ebc7d53286af276a8376e96345de0716c39749d4c56		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 3072 bytes
ooxml_oleobject_00_ole10native_00.bin
e37044bc6da83cdd5da9d61c1576e503fbb2f5ba0544d44947838baf0ee3c147		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 745 bytes
emf_00.emf
3262f1fb8036a33383ba0e45909acbe71f15af46789190975d4d0a53d82a1af4		 ooxml-emf OOXML EMF part: word/media/image1.emf 7960 bytes

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