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.
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• 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://krisoc.ru/uplcv?utm_term=restore+photos+deleted+from+gallery PDF link annotation

  • http://blossomtour.net/FileData/ckfinder/files/20210906_5B167AED160DE825.pdfIn PDF document text
  • http://pathtojanna.com/userfiles/files/vesalarafexakot.pdfIn PDF document text
  • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/8iu30k1uecnf5pqae9eo7oech1/sarolidirugigasuvemude.pdfIn PDF document text
  • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebe7a3554e---zujewupexudexufujefuv.pdfIn PDF document text
  • http://riccaassociati.eu/userfiles/files/gusavokakosoteretizazijet.pdfIn PDF document text
  • https://viveironativodevicosa.com.br/ckfinder/userfiles/files/92296988064.pdfIn PDF document text
  • http://telektrans.hu/editor_up/97811366086.pdfIn PDF document text
  • https://www.corpeverest.com/ckfinder/userfiles/files/furatanusatitexarup.pdfIn PDF document text
  • http://agrihitech.net/media/ftp/file/4117220382.pdfIn PDF document text
  • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/0gjddc3ipaah02v1d1ufkjlu0b/xulibivesudek.pdfIn PDF document text
  • http://galettedesrois.eu/userfiles/file/41115641873.pdfIn PDF document text
  • http://matsusushionline.com/uploads/files/xitajitipari.pdfIn PDF document text
  • https://stthomasorthodoxchurchsouthpampady.com/userfiles/file/xavutusudovisej.pdfIn PDF document text
  • http://www.ciesol.com/ckfinder/userfiles/files/pejunotida.pdfIn PDF document text
  • http://gimhaejazz.com/fckeditor/userfiles/image/21112963853.pdfIn PDF document text
  • http://dush-kz.ru/uploads/fck/file/15205065085.pdfIn PDF document text
  • https://decoveinvestment.com/userfiles/file/fimunejisira.pdfIn PDF document text
  • https://nexapos.com/upload/files/sivelixabajon.pdfIn PDF document text
  • http://antropolog.ru/userfiles/file/82028080721.pdfIn PDF document text
  • http://farmaciafoglia.eu/userfiles/files/46078272485.pdfIn PDF document text
  • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/2a108b6bfeeb2f65bb0ecec21d052ee0/25723505780.pdfIn PDF document text
  • https://lawtutors.co.uk/js/ckfinder/userfiles/files/bijepivasibox.pdfIn PDF document text
  • https://careersourceokaloosawalton.com/files/public/96985675490.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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