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

Static analysis result for SHA-256 df48b61067c1c0aa…

MALICIOUS

Office (OOXML) / .DOC

228.6 KB Created: 2020-05-21 17:33:00 UTC Authoring application: Microsoft Office Word 14.0000
MD5: 60ea95fea02befd8b01d18ec5eef2ec2 SHA-1: f8e9ec2f7db552c08e00d605773435cc626702aa SHA-256: df48b61067c1c0aa29c3733db29074f91507d09c9d071e2ed48ecc9b996ffd2c
208 Risk Score

Malware Insights

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

The sample is an OOXML document containing VBA macros, specifically a Document_Open macro that uses GetObject, indicating malicious intent. The document body presents a fake invoice for pharmaceutical products, suggesting a phishing or scam lure. The presence of a critical ClamAV detection for 'Doc.Dropper.HexEncodedEXEHeader' further confirms its malicious nature. The embedded URL 'http://topharmaceutical.net/' is flagged as suspicious and likely part of the attack chain.

Heuristics 7

  • ClamAV: Doc.Dropper.HexEncodedEXEHeader-9789587-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Dropper.HexEncodedEXEHeader-9789587-1
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
  • External hyperlinks (2) low OOXML_EXTERNAL_HYPERLINKS
    Document contains 2 external hyperlinks — clickable URLs are stored as external relationships. First target: http://topharmaceutical.net/
  • 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/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
12ba65bc5cf43ff8e9db911f3c4366ec4574a98606de148114bfb0acd3633b28		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 15889 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 shell/COM execution token(s). Carved artifact contains 41 Chr/ChrW string-construction calls.
vbaProject_00.bin
d7a6a588cdc29a9a7aa8c22aab6e9c6238eac7fc160c5f1e4a4735934d0d16ba		 vba-project OOXML VBA project: word/vbaProject.bin 39936 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 shell/COM execution token(s). Carved artifact contains 1 long base64-like blob(s).

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