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

Static analysis result for SHA-256 48901417081e784f…

MALICIOUS

Office (OOXML) / .DOCX

22.9 KB Created: 2021-03-15 13:26:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 03c5b2ed5ee3d2e881c7a2e2cfc64114 SHA-1: b5fee5eca8a48189661fdb65639e8d8d2c9ef2aa SHA-256: 48901417081e784faafa85be831523dd6ad7b56acd242c3ac9b1b444e3077e1c
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is a DOCX document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. ClamAV signatures indicate this is a known malicious macro. The presence of VBA macros and the Document_Open heuristic strongly suggest the intent is to download and execute a secondary payload, typical of macro-based malware delivery.

Heuristics 5

  • ClamAV: Doc.Macro.APMPKILL-6097118-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Macro.APMPKILL-6097118-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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
    • http://schemas.microsoft.com/office/drawing/2014/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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
dbbb8b2eb2d03bf32a18c3cefba42cb473b2b9806a5cc5f203253c9cb28c6f04		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1045 bytes
vbaProject_00.bin
29ae6619e006343b31c5da4b7bf8cafaea8b804717804f37b793e35cf41af279		 vba-project OOXML VBA project: word/vbaProject.bin 12288 bytes
Detection
ClamAV: Doc.Macro.APMPKILL-6097118-0
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.