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

Static analysis result for SHA-256 c02097c3a7c771b5…

MALICIOUS

Office (OOXML) / .DOCX

116.8 KB Created: 2018-11-08 11:42:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2026-06-07
MD5: f34774f14d948124325f51ed22b4f6d4 SHA-1: 400b9ad03404c5993171a57c26bc4f3b0a4f84e0 SHA-256: c02097c3a7c771b55560b332923a60f8600fbf7219a28baadbad4bf7444dbe4a
190 Risk Score

Malware Insights

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

The sample contains VBA macros, including a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The macro attempts to download and embed a remote image from 'http://download-sicherheit.de/b5121723-7351-4b13-8bb2-2d5bbf71c883', indicating a likely attempt to establish a connection to a malicious server or download a secondary payload. The presence of an embedded Office document with suspicious static findings further supports the malicious nature of this file.

Heuristics 8

  • Embedded Office document has suspicious static findings critical EMBEDDED_OFFICE_CHILD_STATIC_TRIAGE
    A CFB/OLE Office document was found inside another file type and its carved contents matched Office exploit or payload heuristics. This catches wrapped exploit documents where the top-level file routes to a PE, archive, or generic scanner instead of Office.
  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    This finding applies to a carved embedded Office document found at a nonzero offset inside the submitted file, not directly to the top-level document. OLE file is 79,195 bytes but its declared streams total only 11,229 bytes — 67,966 bytes (86%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Remote image (web beacon / tracking pixel) medium OOXML_IMAGE_BEACON
    Document references an external image URL — loads automatically on open, revealing IP address and timestamp to the server (used for phishing tracking and NTLM hash theft on corporate networks)
  • External relationship medium OOXML_EXTERNAL_REL
    External target in word/_rels/document.xml.rels: http://download-sicherheit.de/b5121723-7351-4b13-8bb2-2d5bbf71c883
  • VBA macros detected medium 1 related finding OLE_VBA_MACROS
    This finding applies to a carved embedded Office document found at a nonzero offset inside the submitted file, not directly to the top-level document. Document contains VBA macro code
  • Document_Open macro low OLE_VBA_DOCOPEN
    Document_Open macro
    Matched line in script
    Sub Document_Open()
  • 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://download-sicherheit.de/8b130dff-57b1-485d-8133-a18b537eb8dc In document text (OOXML body / shared strings)
    • http://download-sicherheit.de/b5121723-7351-4b13-8bb2-2d5bbf71c883OOXML external relationship
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvasIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/content-typesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocumentIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/imageIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/footerIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/stylesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/endnotesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/themeIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/customXmlIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTableIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/2006/relationships/vbaProjectIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/footnotesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/headerIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettingsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/settingsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/pictureIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2010/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/thememl/2012/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/2006/relationships/wordVbaDataIn document text (OOXML body / shared strings)
    +12 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 684 bytes
SHA-256: 6c63b293455782a6e96622b521fed7902f664940ccf962ffc7e826b58c9a8527
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

Sub Document_Open()

    Dim imagePath As String
    imagePath = (Trim(Split(ActiveDocument.Sections(1).Headers(wdHeaderFooterPrimary).Range.Text, vbCr)(0)))


    ActiveDocument.Shapes.AddPicture FileName:=imagePath, _
    LinkToFile:=False, _
    SaveWithDocument:=True, _
    Left:=-71, _
    Top:=-71, _
    Anchor:=Selection.Range, _
    Width:=843, _
    Height:=596
End Sub
vbaProject_00.bin vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes
SHA-256: 7c8a7815d242671520a4b6820a0867d4113743dba29532ae87e1a4c9ef07cd5b
embedded_office_off00009dac.ole embedded-office Embedded OLE/CFB Office body inside ooxml container at offset 0x9DAC 79195 bytes
SHA-256: 1cd7883f2b5dceba2943e55e6be00e8b819a9190acf6128d80e14ee95e99ee67

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