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://krisoc.ru/uplcv?utm_term=how+to+lock+your+photos+on+android PDF link annotation

  • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614cbfcf5e27d---43091111053.pdfIn PDF document text
  • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613364a80fa89---54056535263.pdfIn PDF document text
  • http://ibconsulting.it/userfiles/files/vulerimoverunavo.pdfIn PDF document text
  • http://otelm4b.ru/admin/ckfinder/userfiles/files/88716458102.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/jfe8u2lbkg71h7ngldesuvtth6/27450004092.pdfIn PDF document text
  • http://irinaburmistrova.ru/files/bopak.pdfIn PDF document text
  • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16139419934efa---77343209993.pdfIn PDF document text
  • http://safedoorsystems.com/cmsimages/file/21625035007.pdfIn PDF document text
  • http://edisonprivateschoolbeta.com/cote_dor_import/admin/ckfinder/userfiles/files/bosidesotivozudowetara.pdfIn PDF document text
  • https://rubin2000-distribuitorshop.ro/userfiles/file/24338990142.pdfIn PDF document text
  • https://emailing-online.fr/uploads/userfiles/file/40452443540.pdfIn PDF document text
  • http://baovephuongtroi.com/vietkiendo/upload/file/sexin.pdfIn PDF document text
  • http://czernavendeghaz.hu/admin1/file/65094143573.pdfIn PDF document text
  • http://brandnewgoods.net/userfiles/file/negamaravemabeterina.pdfIn PDF document text
  • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/1a43dee47e567b6c969b621b8ae51a06/75745757649.pdfIn PDF document text
  • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614e02dd9d736---38283152868.pdfIn PDF document text
  • http://german-ex.com/images/blog/file/87074791219.pdfIn PDF document text
  • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/qv105f1uggenl9upff1qeasfs3/niruzisemufivaxidomak.pdfIn PDF document text
  • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/825aea4a8c78676a0d51f79f79e66a8e/70969657015.pdfIn PDF document text
  • http://daiichibus.vn/uploads/news_file/88095647912.pdfIn PDF document text
  • http://debten.net/UserFiles/File/saleribanaginefujil.pdfIn PDF document text
  • https://altonika.pro/files/fck/file/pezilifesomigafika.pdfIn PDF document text
  • https://ssvacancy.com/ckfinder/userfiles/files/nemaxadevemil.pdfIn PDF document text
  • http://alarmy-kamery24.pl/userfiles/file/62233731380.pdfIn PDF document text
  • http://showplus.ae/userfiles/files/99786937253.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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