Malicious PDF — malware analysis report

Heuristics 7

• 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.
• 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 http://zgic.ru/!upload/files/lagux.pdf In PDF document text

  • http://kiuruvedenlukio.fi/tiedostot/file/98970741845.pdfIn PDF document text
  • https://nenmongdangquang.com/upload/files/60451758789.pdfIn PDF document text
  • http://www.ez4parcel.net/upfile/files/2021/09/17/noralid.pdfIn PDF document text
  • http://d-innovation.com/upload/files/kazoxifaxuxesade.pdfIn PDF document text
  • http://daming-school.com/userfiles/file/34547339454.pdfIn PDF document text
  • http://soc-in.com/data/media/files/31574688568.pdfIn PDF document text
  • https://mollis.rs/files/55342579504.pdfIn PDF document text
  • https://marcvandewiele.com/userfiles/file/pamapuxodatofabuvoko.pdfIn PDF document text
  • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/toravuzojuvalozemufuj.pdfIn PDF document text
  • http://paoladebenedetti.eu/userfiles/files/lufidewero.pdfIn PDF document text
  • http://tulga.ru/editor/files/mujuxe.pdfIn PDF document text
  • http://changwontour.kr/FileData/ckfinder/files/20210901_1355A3F3E6ABFEB7.pdfIn PDF document text
  • https://floresdeserrezuela.com/aym_image/files/94876961776.pdfIn PDF document text
  • http://spreewaldpension-luebben.de/meineBilderAlbertGrundschule/file/burujada.pdfIn PDF document text
  • https://ww150003.linebot.net/upfile/files/20210905232139.pdfIn PDF document text
  • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/bead8357907634069733611ef2fd10fb/15872982670.pdfIn PDF document text
  • https://oykufestivali.com/ckfinder/userfiles/files/64863685231.pdfIn PDF document text
  • http://huabulaw.com/uploadpic/2021-9/file/2021091519012773499.pdfIn PDF document text
  • https://shian-jin.com/UserFiles/files/nodiwa.pdfIn PDF document text
  • http://studio70.eu/userfiles/files/xikutavawibeker.pdfIn PDF document text
  • http://autohondl.cz/userfiles/file/derubuxanodetodinu.pdfIn PDF document text
  • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161426cf8beee9---robuvegujulepuzog.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/3pfi3cpu4pjplkbb834qob0ti0/35543467146.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=idm+638+build+18+crackPDF 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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