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://ausztriasi.spawellness.hu/upload/hirlevel/files/3960167852.pdf In PDF document text

  • https://ww150002.linebot.net/upfile/files/20210916203512.pdfIn PDF document text
  • http://cuacuontoanthang.com/media/file/megaros.pdfIn PDF document text
  • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/dufiwegamuju.pdfIn PDF document text
  • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/6cad66492258d26f4d182da076f2812d/dexogididova.pdfIn PDF document text
  • http://chupanhnoithat.vn/upload/files/ponaxax.pdfIn PDF document text
  • http://mfahk.com/upload/files/89014041166.pdfIn PDF document text
  • http://gradn.ru/uploades/fckeditorfile/44160714055.pdfIn PDF document text
  • https://chungangroup.com/uploads/files/202109121251102130.pdfIn PDF document text
  • http://ambulatorioveterinariovianello.eu/userfiles/files/98064775332.pdfIn PDF document text
  • https://etest.vn/app/webroot/uploads/files/18692265459.pdfIn PDF document text
  • http://tajesink.com/Uploadfiles/files/migokifovaderegoxuladeg.pdfIn PDF document text
  • https://angel-juicer.com/FileData/ckfinder/files/20210916_D94F61197564737A.pdfIn PDF document text
  • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/12762707014.pdfIn PDF document text
  • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/xerefewuselapekeboteto.pdfIn PDF document text
  • https://smgbid.com/ckfinder_userfiles/files/wevizibasugi.pdfIn PDF document text
  • http://chroscina.com/userfiles/file/60345914437.pdfIn PDF document text
  • http://casms.org/atts/news-files/file/56216558672.pdfIn PDF document text
  • https://delcinfo.ru/img/files/files/3582007574.pdfIn PDF document text
  • http://due.pt/js/ckfinder/userfiles/files/vubadi.pdfIn PDF document text
  • http://tractortools.cz/ckfinder/userfiles/files/37329440250.pdfIn PDF document text
  • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16135aa2989e59---fufufewenajirunelisi.pdfIn PDF document text
  • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613024e8ec7c2---5899691658.pdfIn PDF document text
  • http://imdad-egypt.com/userfiles/file/72310703623.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=nigerian+movie+2020+latest+full+moviesPDF 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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