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

Static analysis result for SHA-256 df8d98027b2da522…

MALICIOUS

Office (OOXML) / .DOC

112.9 KB Created: 2020-07-02 08:45:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: fdd0897df03072b90bef46e2f54bc3f3 SHA-1: e55bbbe00561aa6ed70a7879ef911747cc4edbeb SHA-256: df8d98027b2da522a53ebacd3a799fd8e85c21511ec61fef9dbc600140f1bdc3
140 Risk Score

Malware Insights

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

The OOXML document contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code automatically when the document is opened. The presence of CreateObject calls further indicates an attempt to run arbitrary code. While no specific malicious URLs or payloads were extracted, the macro's presence and auto-execution capability strongly suggest a malicious intent, likely to download and execute a second-stage payload.

Heuristics 5

  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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.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/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
822ddc6e9892b49f434350ea47b091a4755cba8ae77406e27826a7f8a0a8119e		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1824 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
aab917ea8328d2cb9a5f1173aaa78099420244ffafee8a41758b2a2c70aac2b5		 vba-project OOXML VBA project: word/vbaProject.bin 11776 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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