Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 3bddb2e1a85a9e06…

MALICIOUS

Office (OOXML)

13.0 KB Created: 2021-08-19 23:24:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 6f194654557e1b52fb0d573a5403e4b1 SHA-1: d05fc61894cb7652dce69edd6e4cf7e4e639754a SHA-256: 3bddb2e1a85a9e06b9f9021ad301fdcde33e197225ae1676b8c6d0b416193ecf
162 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious due to critical heuristic firings indicating exploitation of CVE-2021-40444 via an external OLEObject. This technique leverages a remote HTML resource hosted at http://pawevi.com/e32c8df2cf6b7a16/specify.html to execute malicious code. The document likely serves as a spearphishing attachment designed to exploit this vulnerability.

Heuristics 4

  • External OLEObject gadget — CVE-2021-40444 critical CVE exact CVE_2021_40444
    External relationship to mhtml:http://pawevi.com/e32c8df2cf6b7a16/specify.html!x-usc:http://pawevi.com/e3 — exploitable external OLEObject gadget pattern for CVE-2021-40444
  • ClamAV: Doc.Exploit.CVE_2021_40444-9891528-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.CVE_2021_40444-9891528-0
  • External relationship high OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: mhtml:http://pawevi.com/e32c8df2cf6b7a16/specify.html!x-usc:http://pawevi.com/e32c8df2cf6b7a16/specify.html
  • 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://pawevi.com/e32c8df2cf6b7a16/specify.html!x-usc:http://pawevi.com/e3
    • http://pawevi.com/e32c8df2cf6b7a16/specify.html!x-usc:http://pawevi.com/e32c8df2cf6b7a16/specify.html
    • 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.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • http://schemas.microsoft.com/office/word/2020/wordml/sdtdatahash
    • 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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