Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0dbad9d5ab586a7…

MALICIOUS

PDF

444.2 KB Created: 1910-30-11 21:62:05 Authoring application: Adobe PageMaker 6.5 (via Acrobat Distiller 3.0 for Windows)
MD5: 9e7e32ad31c522188f9bb0c1750f3241 SHA-1: d1c8aae901e761211c880ca8b0aebbf255df45f1 SHA-256: b0dbad9d5ab586a76dc6b56817e72e3ac62b41d66474f41d578faf85b9b996d6
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier also flagged the PDF as malicious. The embedded script, identified as 'embedded_pdf_script_00030edf.bin', is likely responsible for downloading and executing a secondary payload, which is a common technique for malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7588

Heuristics 6

  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85
    ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
  • Suspicious extracted artifact info 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.
  • 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://CBSE.QuestionPaper.in/Javascript/sdmenu.css
    • http://QuestionPaper.in/Images/ico.png
    • http://QuestionPaper.in/University/UniversityBrowser.aspx
    • http://QuestionPaper.in/SearchResults.aspx
    • http://AIPMT.questionpaper.net
    • http://aieee.questionpaper.net
    • http://CBSE-10th.questionpaper.net
    • http://CBSE-12th.questionpaper.net
    • http://CPT.questionpaper.net
    • http://cbse.questionpaper.in
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=39&amp;bn=3
    • http://www.QuestionPaper.in/IIT/IITSyllabus.aspx
    • http://www.QuestionPaper.in/IIT/IITInstitutes.aspx
    • http://www.QuestionPaper.in/IIT/IITSyllabus.aspx#math
    • http://www.QuestionPaper.in/IIT/IITSyllabus.aspx#physics
    • http://www.QuestionPaper.in/IIT/IITSyllabus.aspx#chemistry
    • http://www.QuestionPaper.in/IIT/IITSyllabus.aspx#aptitude
    • http://www.QuestionPaper.in/AIEEE/AIEEE.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE.aspx?id=40
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=40&amp;bn=4
    • http://www.QuestionPaper.in/AIEEE/AIEEEInstitutes.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE_Bulletin.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE_Mathematics_Syllabus.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE_Physics_Syllabus.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE_Chemistry_Syllabus.aspx
    • http://www.QuestionPaper.in/AIEEE/AIEEE_Aptitude_Syllabus.aspx
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=41&amp;bn=5
    • http://QuestionPaper.in/AIPMT/AIPMT_Biology_Botany_Zoology_Syllabus.aspx
    • http://QuestionPaper.in/AIPMT/AIPMT_Physics_Syllabus.aspx
    • http://QuestionPaper.in/AIPMT/AIPMT_Chemistry_Syllabus.aspx
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=292&amp;bn=24
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=293&amp;bn=24
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=294&amp;bn=24
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=295&amp;bn=24
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=296&amp;bn=24
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=331&amp;bn=30
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=332&amp;bn=30
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=333&amp;bn=30
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=334&amp;bn=30
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=335&amp;bn=30
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=336&amp;bn=31
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=337&amp;bn=31
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=297&amp;bn=25
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=298&amp;bn=25
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=299&amp;bn=25
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=300&amp;bn=25
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=311&amp;bn=28
    • http://www.QuestionPaper.in/MAT/MAT.aspx
    • http://www.QuestionPaper.in/QuestionPaper.aspx?id=338&amp;bn=32
    • http://www.QuestionPaper.in/QuestionPaper.aspx?bn=6&amp;id=43
    +127 more URL(s)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00030edf.bin
039eb51283d36cd6d936ab9d445f02b7af0e67e8010b68f9d2a0d062dee5876a		 pdf-embedded-script PDF decompressed stream script payload at offset 0x30EDF 454271 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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