Malicious Office (OOXML) / .DOC — malware analysis report

Static analysis result for SHA-256 4cc5e604af447cd7…

MALICIOUS

Office (OOXML) / .DOC

695.9 KB Created: 2023-06-11 02:09:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2023-10-06
MD5: b25584595b35210ed9402abbb7c4ddfc SHA-1: 6b1bf8ed45ea48b35dd4ae1e11b2195c41ea0a55 SHA-256: 4cc5e604af447cd7909d7c704571c4e2445ff08d526ffb2d58c30cacae491b00
84 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1059 Command and Scripting Interpreter

The sample exhibits characteristics of a malicious OOXML document, specifically triggering heuristics for remote template injection and external relationships. The embedded URL 'https://avbc.me/39YLq6ug' is highly suspicious and likely serves as the source for a secondary payload. The presence of an embedded OLE object further supports the malicious nature of this document, suggesting it's designed to download and execute arbitrary code.

Heuristics 5

  • Remote template injection high OOXML_REMOTE_TEMPLATE
    Document references a remote template URL (https://avbc.me/39YLq6ug) — 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://avbc.me/39YLq6ug
  • 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://avbc.me/39YLq6ug
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
1def977f91a9c6b0be2a9b013d5d882a88020c8ea471d3785ac16638ee094982		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject2.bin 5632 bytes
ooxml_oleobject_01.bin
8de65209996ea314f9fc64528f5b11f3c10a147a241723ae67eac0b5522a3cd3		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 316416 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.75, consistent with packed or encrypted content.
emf_00.emf
6abca8334cf34a16da88511242da6a55708966a9fe88cfd3b373d781c45c585f		 ooxml-emf OOXML EMF part: word/media/image1.emf 1505804 bytes

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