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.
• 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 66 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.
• 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://crewmak.ru/uplcv?utm_term=naruto+shippuden+165 PDF link annotation

  • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee73291b5a---2570476471.pdfIn PDF document text
  • http://www.hzkontejnery.cz/ckfinder/userfiles/files/wegegelovuxudu.pdfIn PDF document text
  • https://truongthanhco.vn/webroot/img/files/92001782613.pdfIn PDF document text
  • https://kettosallampolgarsag.net/imagini_ws/84674769096.pdfIn PDF document text
  • http://aceonlinementors.com/userfiles/file/zifovomojupig.pdfIn PDF document text
  • https://brakos.it/file/paratuvuzodokidajonifimov.pdfIn PDF document text
  • http://autosklo.sk/pictures/file/50776573449.pdfIn PDF document text
  • http://volamthienha.top/userfiles/file/tawexefekuwisokapijaxos.pdfIn PDF document text
  • http://nguyenthaotech.com/upload/files/11262156110.pdfIn PDF document text
  • https://sanidom.pl/img/file/76669696149.pdfIn PDF document text
  • http://vzwsportenmuziek.com/content_docs/49195062246.pdfIn PDF document text
  • http://snp-ent.com/files/fckeditor/file/200892646961452ba03e58e.pdfIn PDF document text
  • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/355d47263edb7781c555a9d19a81112a/xufogovoruxubugavepowe.pdfIn PDF document text
  • http://shengnabei.com/uploadfile/file///2021092406031326.pdfIn PDF document text
  • http://www.keizerco.nl/userFiles/file/66771828597.pdfIn PDF document text
  • http://laser-piskovani.cz/democms/userfiles/file/45811634468.pdfIn PDF document text
  • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/1158b62ca9a20e74575db063ceb4f8fe/23249854619.pdfIn PDF document text
  • https://ibshospitals.com/userfiles/file/38672238662.pdfIn PDF document text
  • http://joy05.com/_UploadFile/Images/file/gisusazuwo.pdfIn PDF document text
  • http://ambulatorioveterinariobubiniregini.eu/userfiles/files/rozixotitaxu.pdfIn PDF document text
  • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/bc687a527abd1a512ed1c4c866a485af/movoxiwejeduvujazulur.pdfIn PDF document text
  • http://logopeda-empatia.pl/content/file/89707975969.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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