Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 653628fb6ea0d3d1…

MALICIOUS

Office (OOXML)

336.1 KB Created: 2016-10-05 19:20:00 UTC Authoring application: Microsoft Office Word 15.0000 First seen: 2020-09-15
MD5: 5e49a5b02a90a4ceba4604efc79b389b SHA-1: b3e9cf4a8248e50c98d910f94597a5d4267dbbc1 SHA-256: 653628fb6ea0d3d14705debc30d986332cc004c1f6be01cf4e6284ce5128c263
84 Risk Score

Malware Insights

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

The file is a malicious OOXML document containing embedded OLE objects. One heuristic indicates that these packages drop an auto-executable payload, specifically mentioning JAR files. This suggests the document is designed to deliver and execute a secondary payload, likely for malicious purposes.

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/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)
    • http://www.apple.com/DTDs/PropertyList-1.0.dtdIn 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/xap/1.0/mm/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/xap/1.0/sType/ResourceRef#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/photoshop/1.0/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/tiff/1.0/In document text (OOXML body / shared strings)
    • http://ns.adobe.com/exif/1.0/In document text (OOXML body / shared strings)
    • http://www.iec.chIn 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/oleObject2.bin 40448 bytes
SHA-256: b2556f9b8e30c8a47e4389dbd8cefb69391b47bd5725e519b0eaa8568b06acf4
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject2.bin Ole10Native stream: Ole10Native 26700 bytes
SHA-256: 596ce69a70e8934a0e47d9b461a93ed6a93836219a162eb787ac472c4b66542d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.57, consistent with packed or encrypted content.
ooxml_oleobject_01.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 46592 bytes
SHA-256: ff757c5460a96c322807a0c45963d0b8bae8ab223779fbf8849c47e8eec964ac
ooxml_oleobject_01_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 33020 bytes
SHA-256: b15da2e3188a0885fc486819a6392c0ec08b5cb6723ec370f8e3fef42419bdea
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.75, consistent with packed or encrypted content.
emf_00.emf ooxml-emf OOXML EMF part: word/media/image2.emf 10132 bytes
SHA-256: dddba4b65e950450fe3b5d1d9279f0fb064e14c2945eae7bafbadbb916631cac
emf_01.emf ooxml-emf OOXML EMF part: word/media/image3.emf 10172 bytes
SHA-256: ed8fb9ab9bf04f12d5444becac26b7d83fbcbde49aea22231ac3f85d65cd0a23

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