Malicious PDF — malware analysis report

Heuristics 7

• 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://laborke.ru/uplcv?utm_term=android+11+m31s PDF link annotation

  • https://ambulatorioveterinariosismondi.eu/file/rarejerefuzoxokamofa.pdfIn PDF document text
  • http://angelojrobles.com/admin_initial_test/userfiles/file/xijul.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c344aec5ff---janijazan.pdfIn PDF document text
  • http://formpart.com/upload/ckfinder/files/pufufamupusogow.pdfIn PDF document text
  • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/22278765136.pdfIn PDF document text
  • https://argentinaproduct.com/ckfinder/userfiles/files/48658884724.pdfIn PDF document text
  • http://kutscher-customs.de/gfx/userfiles/files/27775138671.pdfIn PDF document text
  • https://jiu-hang.com/upfiles/editor/files/90782196784.pdfIn PDF document text
  • https://kapefashion.com/files/files/65562397810.pdfIn PDF document text
  • https://fond.ru/userfiles/file/96356767531.pdfIn PDF document text
  • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/4dcbe01c1ee3b47b656cbbf52abc95bb/15488753873.pdfIn PDF document text
  • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/6c99cd6c4a728ffca8819497e27668b1/jagesepivapotuxudi.pdfIn PDF document text
  • http://hzeiger.com/userfiles/file/nopuritabu.pdfIn PDF document text
  • http://mebizstekla.ru/userfiles/file/21061053058.pdfIn PDF document text
  • https://iamtimeshare.com/userfiles/file/8700425000.pdfIn PDF document text
  • http://opusbiz.kr/data/editor/file/150925070761318d2c5c301.pdfIn PDF document text
  • https://tlproduct.com/userfiles/file/72641998969.pdfIn PDF document text
  • http://bresky.cz/res/file/4846065116.pdfIn PDF document text
  • http://downtowncincyhotels.com/core_degree/admin/images/cms_imagesfiles/18972294859.pdfIn PDF document text
  • http://www.pvvc.cz/files/74537590658.pdfIn PDF document text
  • http://esejsc.com/upload/files/8854242778.pdfIn PDF document text
  • http://saigonford3s.com/uploads/2021-09-10/images/files/28593433494.pdfIn PDF document text
  • http://naturabliskociebie.pl/userfiles/file/8694824859.pdfIn PDF document text
  • https://erdemlerkoleji.com/resimler/files/vilasogusebo.pdfIn PDF document text
  • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/a065595b3d839d2e14931bf4b06e34ed/10563421576.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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