Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d78c792662e4e7…

MALICIOUS

PDF

54.0 KB Created: 2021-07-02 20:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3a80f53851d18ef9339c07b8767c6032 SHA-1: 16d4b0e8888fd765c8b1b7c537ec861cce0e3824 SHA-256: a5d78c792662e4e70b723ffb0ead4119337e6d7ea368cc2cf75cd3e64f1d2697
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8263

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160951d25b62b5---sajupalamanokemaluz.pdf In PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/gvum0s2tbvcfsu7qthg1jalqjf/17653532325.pdfIn PDF document text
    • http://abnicum.com/files/file/2524739630.pdfIn PDF document text
    • http://groupkaishan.com/d/files/vibumaget.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a8948e0978a---taruvudop.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/17206889719.pdfIn PDF document text
    • http://udokutscher.de/gfx/userfiles/files/73236806327.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090fc9e86c4f---fipesinimemijutonaz.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/7vmuk1b4n5vgfmrb8hfa0mgg2s/jololalisixag.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/22049376856.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607da1d8bafa2---gatejasudud.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3e6f7df5c---lowuserax.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/8d54f4134e22893b77b654db5fca00a6/kadedufumelowiv.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/90110609732.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/63624362264.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/davez.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/dkn8uo0bml7b5e2bsaj79tibkh/gazama.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/2f39a725ab7dbb67ca859dc83298acff/19843243279.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/e627b7168fdaeb1c0a832bb4e7ea7769/33884749953.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aafd56c7ba---woribugukebajiragaxal.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b12f97d9d81---makoxusogugisawedijujowa.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rejunula.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2341b470fd---61555423671.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/e0b2fec0bfc4ac809ba9f45cd2602c6c/25850353400.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/50036199548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pitch+perfect+2+openloadPDF link annotation

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