Malicious PDF — malware analysis report

Heuristics 8

• 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 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.
• 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://pristineleather.com/userfiles/file/xejuj.pdf In PDF document text

  • http://chaukitchen.com/uploads/files/pideg.pdfIn PDF document text
  • https://koparieshorvathbusz.hu/files/file/puvuzovamatugosamemozowom.pdfIn PDF document text
  • https://gadesign52.com/uploads/files/202109210428275227.pdfIn PDF document text
  • http://www.kymenhome-etsinta.net/tiedostot/files/34577196644.pdfIn PDF document text
  • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/watonabegefowepej.pdfIn PDF document text
  • http://xfswchem.com/upload/files/3348486263.pdfIn PDF document text
  • http://ksklinika.ru/ckfinder/userfiles/files/sosozaparadagemed.pdfIn PDF document text
  • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/fejaruvamefuzodivarosi.pdfIn PDF document text
  • http://xaydunganphubacninh.com/webroot/img/files/xexixik.pdfIn PDF document text
  • http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/ditakonilojejisenir.pdfIn PDF document text
  • http://gesundheit-im-blog.de/userfiles/file/sakadotidudagobibikuz.pdfIn PDF document text
  • http://ngocphuocjsc.com/public/default/ckeditor/files/bebod.pdfIn PDF document text
  • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/161528352363f5---tikusaju.pdfIn PDF document text
  • http://lesrimaudieres.com/images/uploads/file/kejelukakuruwexinof.pdfIn PDF document text
  • https://heatingboiler.ca/fck_upload/file/rexalefefawudidufifun.pdfIn PDF document text
  • http://petrduchek.com/files/gumera.pdfIn PDF document text
  • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161424646af3ab---vevebanigeso.pdfIn PDF document text
  • https://360clothing.in/home/www360cl/public_html/uploads/images/files/25897687990.pdfIn PDF document text
  • http://coming-c.com/userfiles/file/sotamaluxobarilugoguvidu.pdfIn PDF document text
  • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615f6d6ecbd4c---xiwojaguviko.pdfIn PDF document text
  • http://tlumacz-bialystok.pl/pliki/file/56091969036.pdfIn PDF document text
  • http://cerrutistudio.eu/userfiles/files/jitatuliki.pdfIn PDF document text
  • http://jmyhship.com/uploadfile/files/29028768835.pdfIn PDF document text
  • https://thic.net/plugin/ce1/ckfinder/userfiles/files/garuxaxilojage.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=example+for+strong+basePDF link annotation
  • 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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