Office (OOXML) / .DOC malware analysis — malicious · 72ac05718b08dd89

MALICIOUS

Office (OOXML) / .DOC

470.0 KB Created: 2024-12-11 10:06:00 UTC Authoring application: Microsoft Office Word 12.0000

MD5: 67f78042b36c5d41502cfd819aed40e1 SHA-1: ec975782a7a39b1e10f1433f11ec779ee4ec2be5 SHA-256: 72ac05718b08dd894d6d3a54ddaf012464042b50c80acdd5fcaf4ca462cb9d85

84 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample exhibits multiple indicators of malicious intent, including remote template injection and an external relationship pointing to the URL https://jktc.pro/NegyN8. The presence of embedded OLE objects and high-entropy carved artifacts further suggests the download and execution of a secondary payload. The primary attack vector is likely spearphishing attachment, leading to exploitation for client execution.

Heuristics 5

Remote template injection high OOXML_REMOTE_TEMPLATE

Document references a remote template URL (https://jktc.pro/NegyN8) — a common remote-template-injection vector used by Hancitor, Emotet and many phishing campaigns. Word can fetch and apply the remote template; macros in that template may execute depending on Office policy and trust state.
External relationship medium OOXML_EXTERNAL_REL

External target in word/_rels/settings.xml.rels: https://jktc.pro/NegyN8
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 https://jktc.pro/NegyN8
- http://schemas.openxmlformats.org/markup-compatibility/2006
- http://schemas.openxmlformats.org/officeDocument/2006/relationships
- http://schemas.openxmlformats.org/officeDocument/2006/math
- http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
- http://schemas.openxmlformats.org/wordprocessingml/2006/main
- http://schemas.microsoft.com/office/word/2006/wordml

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ooxml_oleobject_00.bin` `8550fb21205665d50f2cc14f93ec572c6bf6914d8a5b09566a2b3242a2c6fcc2`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/oleObject1.bin	42496 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.47, consistent with packed or encrypted content.
`ooxml_oleobject_00_ole10native_00.bin` `77df7d6e9714b3fbc72a8c1f54fd5fe85e630186c72a0333a9e4f9c62c96ebd4`	ole-package	OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native	39490 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.70, consistent with packed or encrypted content.
`ooxml_oleobject_01.bin` `85464f86077f6875efb606cabcea820ca068852229c64085de2f499717eed482`	ooxml-ole-object	OOXML embedded OLE part: word/embeddings/Microsoft_Office_Excel_Worksheet1.xlsx	18051 bytes
`emf_00.emf` `5174b392dd049c87b7f9af817ab17ad1f232b0a8900a277e91cd91ddedf3b532`	ooxml-emf	OOXML EMF part: word/media/image1.emf	3217764 bytes
`emf_01.emf` `db6e0b643e7df2adf770109c59829a2dae15b58902c7f3ab837973158cd55df4`	ooxml-emf	OOXML EMF part: word/media/image2.emf	7392 bytes

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