Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a4d5e42c409880…

MALICIOUS

PDF

99.9 KB Created: 2021-06-10 08:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: db74f864a1a08393590fc2777333746e SHA-1: c1002873e4e07c457b35e7f00c92ad1e54385306 SHA-256: 16a4d5e42c40988086e07e47e28ffb80913d923f99fcdf6ec71de2084950d5e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload directories, disguised as a movie download. The presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8732

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://krisoc.ru/uplcv?utm_term=rowdy+rockers+movie+download PDF link annotation
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a403b65dfd4---97529792834.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/wasawogikur.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/28582463526.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/77022943356.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/73459736753.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767caaf2bb2---damupupopaponitawunijugij.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/f3621b877ddee90fe81f7b041b7d11cb/50273269988.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afb8011c3e1---90976677360.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1608c550ba90a4---sajozi.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/65635802958.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/ribabiputaf.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/tawixefefabagaroxo.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/nulcmeeqs52kuk9p3tff596eid/gonudib.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0ce86098---60685704809.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5aca19a6b1---vidodajiwejatolatamiwunad.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/barefalilabuxikimewaza.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec14d800c6---fuzikepozuludurafoxa.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee2d520c9e---47415392958.pdfIn PDF document text

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