Office (OOXML) malware analysis — malicious · 71e6d267c1b5d328

MALICIOUS

Office (OOXML)

310.1 KB Created: 2019-06-17 13:23:47 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2020-02-04

MD5: 4a89637e14b3c3bb0428ab5231aac7a1 SHA-1: df5c7f74a99e8cda712af8fe477d7749822b7b39 SHA-256: 71e6d267c1b5d3288eccbb9cc38285ecbd1033508eb9f8a71cae017b0eef52f1

102 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. Heuristics indicate this object likely contains an executable payload, potentially exploiting CVE-2026-21514. The embedded OLE package is flagged as risky due to dropping an auto-executable payload, suggesting the document's primary purpose is to deliver and execute malware upon opening.

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 medium 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.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/2010/wordprocessingShapeIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject3.bin	470016 bytes
SHA-256: `cc62e1694a3b5f638ce626bda36615a456665cd91507b9edbe0b387282f457d6`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS_X64, SC_STR_GETPROCADDRESS Static shellcode analysis recovered API/import strings: kernel32.dll, KERNEL32.DLL, LoadLibraryA, GetProcAddress
`ooxml_oleobject_00_ole10native_00.bin`	ole-package	OOXML word/embeddings/oleObject3.bin Ole10Native stream: Ole10Native	462976 bytes
SHA-256: `9577cb58035824486a6a2990a21da6f669d0890320303c18f8f89bbcd2d20e60`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: SC_PEB_ACCESS_X64, SC_STR_GETPROCADDRESS Static shellcode analysis recovered API/import strings: kernel32.dll, KERNEL32.DLL, LoadLibraryA, GetProcAddress

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