Malicious PDF — malware analysis report

Static analysis result for SHA-256 9777ddb7b59604bd…

MALICIOUS

PDF

46.4 KB Created: 2021-09-17 00:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 347f1895a4e2941ec4f8ad03d26a2863 SHA-1: 5a2a8627bafd64b9109510359565ee5b6f9ef6b1 SHA-256: 9777ddb7b59604bd449d2d4dc77d1a33b86edb50863250aac0f06e8728cdd642
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, and is identified as a link farm designed to redirect users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kystar.net/filespath/files/20210914015555.pdf In PDF document text
    • https://eastmangroup.org/ckfinder/userfiles/files/jagivigisarevusukem.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/66992609305.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/39901852974.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/64336807842.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/xazesutidakukirokidotesit.pdfIn PDF document text
    • http://kassa.pl/userfiles/file/gixuxuvatoxodotuza.pdfIn PDF document text
    • http://umhouses.com/uploads/files/lupadi.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/25282521292.pdfIn PDF document text
    • http://mishor-uvk.com/uploads/files/24380397504.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/26679631183.pdfIn PDF document text
    • https://sooryasales.com/uploads/file/vobojaxaxeke.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/mobusokekasa.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/ruteb.pdfIn PDF document text
    • http://vin-baietii.ro/ckfinder/userfiles/files/jipanurupupakaxelok.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/tipevot.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/1502062643.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210917063835.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/bixiwamifolupev.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/zepomusop.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141f10f892fe---4792735978.pdfIn PDF document text
    • http://abwsalisbury.com/uploads/files/vutotakunuvufo.pdfIn PDF document text
    • https://stepweystudy.com/ckfinder/userfiles/files/65347469767.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/bosubuvitutakosuzarudum.pdfIn PDF document text
    • http://snsi.jp/image/news_file/bapelizegij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=percy+jackson+the+complete+series+pdfPDF link annotation