Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 2624ee9bcc003b64…

MALICIOUS

Office (OOXML)

356.4 KB Created: 2018-03-28 12:04:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2019-04-17
MD5: 6f8b4e408b443fbfdcc84a618d703638 SHA-1: 394abd2de8d8d26ac4d30a232b01d5c01debbb3e SHA-256: 2624ee9bcc003b64c0d8e41285be9c8b56bfe4854ee78bf07d3017cf4303eb25
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1129 Execution through API execution

The sample is a malicious OOXML document containing an embedded OLE object with indicators for a payload, identified by ClamAV as Doc.Dropper.Agent-6487973-0. This indicates an attempt to exploit a vulnerability (likely CVE-2026-21514) to execute a dropped payload, consistent with a spearphishing attachment.

Heuristics 4

  • ClamAV: Doc.Dropper.Agent-6487973-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6487973-0
  • 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.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn 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/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 279552 bytes
SHA-256: cee38883d68ffba08c36c4c28a1c18446ff945671a09789cee27473d2dfba201
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 274774 bytes
SHA-256: 569dd6b8e4c7a048554f6e5365b4c1d53d987cbbac0635b20faa1cc0a7bc8a0b
ooxml_oleobject_01.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject2.bin 279552 bytes
SHA-256: f9510605f3643cf9dd68c52b57efa555e5d4115fe1882baeb001b8d58c38a671
Detection
ClamAV: Doc.Dropper.Agent-6487973-0
Obfuscation or payload: unlikely
ooxml_oleobject_01_ole10native_00.bin ole-package OOXML word/embeddings/oleObject2.bin Ole10Native stream: Ole10Native 274753 bytes
SHA-256: eb278bd427fbbfdce390826b12c2301680908e6222b888890051c13686664f5e
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 7488 bytes
SHA-256: 60af0a76f815d3390043fa289911c66b8e807b5a535d6531b47803a88ab451f4
emf_01.emf ooxml-emf OOXML EMF part: word/media/image2.emf 7484 bytes
SHA-256: 6aabe031cb45c1e8e1528fe34d930dd4c332fffeac71aea44643c99ff38ba06e

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