Malicious PDF — malware analysis report

Heuristics 9

• 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• 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.
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• External URI info PDF_URI
  PDF contains an external URL action
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• 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://cructi.ru/uplcv?utm_term=candy+crush+mod+apk+unlimited+money PDF link annotation

  • http://gojjang.com/uploads/files/85476555771.pdfIn PDF document text
  • http://driver-jazda.pl/upload/file/34978474685.pdfIn PDF document text
  • http://1mosref.ru/ckfinder/userfiles/files/73561200102.pdfIn PDF document text
  • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613140d869e2a---webafibu.pdfIn PDF document text
  • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/rivijenafobazujej.pdfIn PDF document text
  • http://hamdannepal.com/userfiles/file/55606143160.pdfIn PDF document text
  • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/3faa885423d36d1eaa120136ac1b4f93/topadupalezon.pdfIn PDF document text
  • http://studiolegalebisantis.it/userfiles/files/59822342244.pdfIn PDF document text
  • https://www.pollackmihalyiskola.hu/ckfinder/userfiles/files/vutisonewexa.pdfIn PDF document text
  • http://eastcoastbiker.de/sites/default/files/file/digupakimajuwevapu.pdfIn PDF document text
  • https://beautydiction.com/ckfinder/userfiles/files/janugox.pdfIn PDF document text
  • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/44507509116.pdfIn PDF document text
  • http://mobiliteit.nu/files/9019337617.pdfIn PDF document text
  • http://rydelko.pl/userfiles/file/lavonidejajapa.pdfIn PDF document text
  • http://veiligheidssloten.nl/ckfinder/userfiles/files/ritaxovojodofuxujaritefe.pdfIn PDF document text
  • http://sevoir.hu/uploads/file/17719554744.pdfIn PDF document text
  • http://olgapolyakova.com/files/files/52838348865.pdfIn PDF document text
  • http://northcity.rs/slike/files/9316355580.pdfIn PDF document text
  • http://chistogood.ru/admin/ckfinder/userfiles/files/87628643238.pdfIn PDF document text
  • http://agisma.ru/files/pages/files/3993125474.pdfIn PDF document text
  • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16141ee6e0b32f---28682199645.pdfIn PDF document text
  • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/8da592f0842a867e5893647921950db2/63569956334.pdfIn PDF document text
  • http://mbjarrahi.com/UploadedFiles/New/file/runelepogovirezelamer.pdfIn PDF document text
  • https://godahoian.com/app/webroot/upload/files/49188525301.pdfIn PDF document text
  • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613513c982674---zavonusexujo.pdfIn PDF document text
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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