Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 feee9567822732f5…

MALICIOUS

Office (OOXML)

223.4 KB Created: 2021-10-06 08:08:00 UTC Authoring application: Microsoft Office Word 14.0000 First seen: 2021-10-12
MD5: 57263177046b560d78015b476b40eeeb SHA-1: 73b3d44bbf935bdb10e211223027237791c7a299 SHA-256: feee9567822732f5ef0d25e52883364cb90e8343ae93870cb547d03a70053a54
84 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. This object is identified as a risky file package that drops an auto-executable payload, specifically a JAR file. The presence of this embedded object strongly suggests an attempt to execute a secondary payload upon opening the document.

Heuristics 4

  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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 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 205312 bytes
SHA-256: b0b6628373497b9fa0def49e9c52a33e357eaa55667fd31e5d29771ff69314eb
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 200627 bytes
SHA-256: 69cbf4e09df27ebf4c74451a4e794afa30bb4b70549a03bc073f503930036c55
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 5140 bytes
SHA-256: 1effaef0a0449a0e6ab17c98db7e4adc0b11e8039a50bbc55f11d3d3bd5fe5e2

Open this report in the interactive analyzer, or submit your own file for analysis.