Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 440fdc162613f92a…

MALICIOUS

Office (OOXML)

33.3 KB Created: 2019-05-19 22:16:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2019-08-04
MD5: dd45654bf7f3e78af9bb97cd0f700e5f SHA-1: a1ce19439f57331b2567530245ec2d11f8073b7e SHA-256: 440fdc162613f92a0b04dcb0dd7314c5d628009e78c5690a23160df8dce0403f
242 Risk Score

Malware Insights

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

The sample is an OOXML document containing an embedded OLE object that is flagged as a likely exploit for CVE-2026-21514. This object is designed to drop an auto-executable payload, as indicated by the 'exe' extension heuristic. ClamAV detection further confirms its malicious nature as Img.Dropper.PhishingLure-6329861-0, suggesting a phishing lure dropper.

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.
  • ClamAV: Img.Dropper.PhishingLure-6329861-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Img.Dropper.PhishingLure-6329861-0
  • 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.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/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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 31232 bytes
SHA-256: 7e740f35583909f922991a009371105d0e003ef174dfb0318b61e4232ce5447d
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 28535 bytes
SHA-256: cd44072e63bd98e7c7431687f5ade0eaf1f8a32013ad901ff69ef0748c6988b6
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5320 bytes
SHA-256: 971acb9b9b5e1b504cec2bad4bea83d52dc3b8041f6a0afdf9a3b8d0053445f8
Detection
ClamAV: Img.Dropper.PhishingLure-6329861-0
Obfuscation or payload: unlikely

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