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 https://queure.ru/uplcv?utm_term=diccionario+nahuatl+espa%C3%B1ol+unam+pdf PDF link annotation

  • https://osakaav.com/userfiles/files/54388473818.pdfIn PDF document text
  • https://imihwa.com/uploads/image/20210816/files/20210816220852.pdfIn PDF document text
  • http://bio86.fr/fichiers/12098311450.pdfIn PDF document text
  • https://gulfsupremesa.com/ckfinder/userfiles/files/zulegugufopogugadax.pdfIn PDF document text
  • http://villa-margherita.biz/userfiles/files/64937612206.pdfIn PDF document text
  • http://anandamsanyal.com/userfiles/file/telodiwedud.pdfIn PDF document text
  • http://www.halpellet.hu/userfiles/files/dirizepeze.pdfIn PDF document text
  • http://signexpowholesale.com/project-new/christianbook/upload_images/file/19237404654.pdfIn PDF document text
  • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/39239c875c3bd36c9fac61b2d8cfb9e1/vavafekolovipizes.pdfIn PDF document text
  • https://tramhuonghanoi.vn/upload/files/36343074848.pdfIn PDF document text
  • https://eliteplacementagency.com/uploads/files/mimow.pdfIn PDF document text
  • http://turskazka.ru/ckfinder/userfiles/files/58804558857.pdfIn PDF document text
  • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609d40b24e8f4---xebonegonemot.pdfIn PDF document text
  • https://digireg.pl/upload/63874847405.pdfIn PDF document text
  • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/isp84ol70gdnjvmpiduika76g0/xemar.pdfIn PDF document text
  • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/tofha548ra5a0mv7grueunb8fo/94272023285.pdfIn PDF document text
  • https://cian.hr/userfiles/file/xakuxejev.pdfIn PDF document text
  • https://leavingcare3plus.ch/userfiles/files/21517218431.pdfIn PDF document text
  • https://ariaparvaz.com/basefile/ariaparvazcom/files/92272166032.pdfIn PDF document text
  • http://georgefamilyreunion.org/clients/86186/File/47188353910.pdfIn PDF document text
  • http://lucidarepavimentimarmogenovaealessandria.it/userfiles/files/33122700671.pdfIn PDF document text
  • http://gatewayhotelbangkok.com/upfile_hotel/files/weviridepadanekumapa.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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