Malicious PDF — malware analysis report

Static analysis result for SHA-256 51b3e9017e907b7a…

MALICIOUS

PDF

64.0 KB Created: 2021-08-01 11:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f2c888370ae1cf499be93550c3537cdf SHA-1: 48828abef28b2951b9d5b30a878b4cc7f3e0478a SHA-256: 51b3e9017e907b7adc53a88b596e5350b96449b4eb3627e7e49d0cd10157ff0b
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities or redirecting users to malicious sites. Multiple heuristics indicate the PDF is part of a link farm hosted on potentially compromised or disposable domains, suggesting an attempt to distribute phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://traiteur-ribot.fr/userfiles/file/nutazodajaladaxo.pdf In PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/nizatajejumejofos.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/misoxojimovo.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/kozegipudobudajadoredu.pdfIn PDF document text
    • http://dailyxedayhang.com/userfiles/files/wediluviseva.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/daputatosug.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e41adebc9---jovinokiforozavaliluwar.pdfIn PDF document text
    • http://feach.ie/images/uploads/file/67685544523.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b84deda628---folidivisama.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b465fb0588b---sepidumalozewivub.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/fubegugux.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a76b27942b---vugewive.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16094077a483ec---bexajanimepawa.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aeee79e7e6---60813062639.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/22033353473.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1726cec2defa4ad49f5ae6e89c79cfde/foxexaterokos.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16088b7318c4bb---4207138048.pdfIn PDF document text
    • https://searchlink.org/userfiles//file/muvigosajoxanimo.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/83863250254.pdfIn PDF document text
    • https://amenajarisiconstructii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f9257c8f---55541822141.pdfIn PDF document text
    • https://lanjutpt1.com/contents//files/34793412214.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870f62b7a1---91282147008.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf9a0cc564---85998444167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=exercice+d%27orthographe+6%C3%A8me+pdfPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.