Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 89ab7179a608229c…

MALICIOUS

Office (OOXML)

145.0 KB Created: 2017-10-30 19:42:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2018-01-23
MD5: bfed5e0a800518f139e91591026789a8 SHA-1: e4f4e1971bbc9e0baf2b22bab1821960f9ea24d3 SHA-256: 89ab7179a608229c6418b217a049e38781e2349d79c55d94fa7ba651dbbd9a92
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1027 Obfuscated Files or Information

The file contains an embedded OLE object with indicators of a malicious payload, specifically identified as a potential CVE-2026-21514 exploitation. The presence of a packed executable or script within the OLE object, along with shellcode command strings, strongly suggests the document is designed to exploit this vulnerability for client-side execution. No specific malware family is identifiable from the provided evidence.

Heuristics 4

  • Ole10Native package carries executable/script file type high OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in an executable or script-capable extension. Even without UI extension spoofing, embedding a runnable payload inside an Office document is a high-risk delivery pattern.
  • Suspicious extracted artifact high 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 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.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 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 4608 bytes
SHA-256: f35ac484e562c0cbd7732e34aaf7662cd13e2c844998da9655e5979e2741b284
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): powershell.exe, PowerShell\v1.0\powershell.exe
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 2377 bytes
SHA-256: aac79f13b96ae1a34dc08685afba6fc590adf75b884dd0e62af1c7649136e9fe
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered command string(s): powershell.exe, PowerShell\v1.0\powershell.exe
emf_00.emf ooxml-emf OOXML EMF part: word/media/image1.emf 5424 bytes
SHA-256: 99090f7c310b8bb62ce5a2bd725f1d765b2ea75281efaea4618b2f3b69256de2

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