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

Static analysis result for SHA-256 1c6189f068ee3870…

MALICIOUS

Office (OOXML) / .DOC

107.9 KB Created: 2022-12-14 04:25:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-12-20
MD5: cd3dbd5f1d468da826581361b619b393 SHA-1: 9d5fc2d99aec7c8c18d8af7267b4a31801fda770 SHA-256: 1c6189f068ee3870e1d41511bd55c02cef9d98a816a963a26f95ff0b6becea1f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1204 User Execution T1204.002 Malicious File

The sample is a malicious OOXML document that exploits CVE-2021-40444 via an external OLEObject. The heuristic firings and the presence of an external URL strongly indicate that this document is designed to download and execute a second-stage payload. The document body presents itself as a pro-forma invoice, a common lure for phishing or social engineering attacks.

Heuristics 4

  • External OLEObject gadget — CVE-2021-40444 critical CVE exact CVE_2021_40444
    External relationship to mhtml:https://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr!x-usc:https:// — exploitable external OLEObject gadget pattern for CVE-2021-40444
  • ClamAV: Doc.Exploit.CVE-2021-40444-9891698-2 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE-2021-40444-9891698-2
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: mhtml:https://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr!x-usc:https://pzsrblog.com/wp-content/uploads/2012/PRO
  • 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://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr!x-usc:https://
    • https://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr!x-usc:https://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr
    • https://pzsrblog.com/wp-content/uploads/2012/PROMZwFp385vXr!x-usc:https://pzsrblog.com/wp-content/uploads/2012/PRO
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

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