Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 5697c8eeb965d402…

MALICIOUS

Office (OOXML)

159.8 KB Created: 2018-03-16 08:06:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-03-18
MD5: f91ca9c2c80c94d215690746a340b32c SHA-1: 7dc2a75b70e4f10f571e0c482e557e9fb47c42ea SHA-256: 5697c8eeb965d40231224b8d4c30bb5382ee3a1ad131c789853b1d30fa1326fd
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The sample is an OOXML document identified as malicious by ClamAV, specifically as a dropper. It contains an embedded OLE object that is flagged as dropping an auto-executable payload, identified as a JAR file. This suggests the document's primary purpose is to deliver and execute a secondary malicious payload.

Heuristics 5

  • ClamAV: Doc.Dropper.Agent-6563540-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.Agent-6563540-0
  • 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
  • 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.openxmlformats.org/markup-compatibility/2006 In 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.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/2006/wordmlIn document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/In document text (OOXML body / shared strings)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OOXML body / shared strings)
    • http://ns.adobe.com/photoshop/1.0/In document text (OOXML body / shared strings)
    • http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/mm/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/sType/ResourceEvent#In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#In document text (OOXML body / shared strings)
    • http://www.iec.chIn 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 101888 bytes
SHA-256: 237cfa46d158cc2f2cffb2cda464a3d5fd12a8a64ac4b7ed804628d33ac2005e
Detection
ClamAV: Doc.Dropper.Agent-6563540-0
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 98251 bytes
SHA-256: f8cd9199a4b813cb237d8253219d1e9af05c93e5b6375de787f45470078d5d97
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5140 bytes
SHA-256: 127c93665cb2722a7a5ebcff6527000757227ba3475b6a0a91a925e61678ca3a

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