Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60278a3de8b8075…

MALICIOUS

PDF

48.0 KB Created: 2021-09-27 14:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dea082fadc0e6cbf2c177ef6eb354a42 SHA-1: 7fbfe163ea310b662d30768e30f46277202f477d SHA-256: a60278a3de8b8075eb2b43344b9e27348ae6e3661da0e4f8dd368d4e1cee9efa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7444

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://wastran.ru/uplcv?utm_term=android+app+icon+editor PDF link annotation
    • http://quaretti.it/userfiles/files/45526289817.pdfIn PDF document text
    • http://maha.tcnme.com/chop/multimedia/userfiles/file/josafumimodam.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/datinar.pdfIn PDF document text
    • https://socardan.com/userfiles/files/49231055973.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613780b459c1e---89087592398.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///64666615048.pdfIn PDF document text
    • http://www.jucadent.es/ckfinder/userfiles/files/viguduravububiw.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/mufuwoxurewod.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bd349c0fa---wagodudixijotiwisipaxazit.pdfIn PDF document text
    • https://war-old.its.vn/new/userfiles/file/davigekolazinudutaj.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/zamav.pdfIn PDF document text
    • https://maria-galland.ru/files/file/61282276778.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/12821444750.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/81523552455de269eb6a203048a1f39c/50323160263.pdfIn PDF document text
    • https://suruburi.net/mm/file/ziwimifawirovilunajagi.pdfIn PDF document text
    • http://sartor.ru/upload/files/divokekevetefawenujokaj.pdfIn PDF document text
    • http://pmke.cz/pictures/files/kodatazukiraleju.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/31174092069.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/58780622980.pdfIn PDF document text
    • http://tonghuichem.com/upload/files/jajewilavuro.pdfIn PDF document text
    • https://breedlife.com/upload/files/26014296745.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/73307164419.pdfIn PDF document text
    • https://santehsevast.ru/userfiles/files/4976253638.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/ninejogadagawasaxos.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/basafigumelupemebel.pdfIn PDF document text

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