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.
• QR-code redirect lure medium SE_QR_LURE
  Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
• 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://irlanc.ru/uplcv?utm_term=qr+code+reader+for+alight+motion PDF link annotation

  • http://seoulsquare.com/userfiles/file/fegigowif.pdfIn PDF document text
  • http://lsbwg.com/ckfinder/userfiles/files/20210916/1826041303.pdfIn PDF document text
  • http://caramelitos.sk/files/74007170471.pdfIn PDF document text
  • http://joyandwowbook.com/upload/file/20393580995.pdfIn PDF document text
  • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140e9841fa34---73422064565.pdfIn PDF document text
  • http://cargologicru.com/sadm_files/18176870945.pdfIn PDF document text
  • http://tucholainfo.pl/userfiles/file/67872975494.pdfIn PDF document text
  • http://ambulatorioveterinariopisillibertozzi.eu/userfiles/files/24912156132.pdfIn PDF document text
  • https://semangkabiji.com/contents/files/zesewubabajoritixedib.pdfIn PDF document text
  • https://kaimano.it/file/ritew.pdfIn PDF document text
  • http://boldino-hotel.com/ckfinder/userfiles/files/3185577733.pdfIn PDF document text
  • http://bollnas.boj.se/uploads/userfiles/files/tupeturizisixolatuxe.pdfIn PDF document text
  • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/105e6ee7a577f0a8450c30462398c4db/xuxefijifilojolivifonitin.pdfIn PDF document text
  • https://dp-silver.com/userfiles/file/sumenenawufexarases.pdfIn PDF document text
  • http://como.gattinonimondodivacanze.it/themes/userfiles/files/57613640475.pdfIn PDF document text
  • http://xinshifm.com/userfiles/file/30645382726.pdfIn PDF document text
  • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16148e847aa201---28217417251.pdfIn PDF document text
  • https://cli-kh.com/uploads/files/202109152008295708.pdfIn PDF document text
  • http://jedwines.com/cmsCart/upload/file/57450810053.pdfIn PDF document text
  • https://beauty-full.ru/uploads/files/gosumugavofun.pdfIn PDF document text
  • http://mylodge-naoshima.com/images/blog/file/4426049195.pdfIn PDF document text
  • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/ea518851bbca3a1ed175ef5a1cfe46e5/86726383719.pdfIn PDF document text
  • http://kfgame.snailgame.ru/upload/files/20210924065541.pdfIn PDF document text
  • https://lose-weight.tw/upload/files/jofetejizipul.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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