Malicious PDF — malware analysis report

Heuristics 6

• 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://infrive.ru/uplcv?utm_term=homework+2.3+piecewise+functions+answers

  • http://ccsup.co.th/uploads/ckfinder/files/17467767028.pdf
  • http://alexanderjamesbackcatalogue.com/userfiles/file/sowoniwisiladono.pdf
  • http://hasici-pristroje-eshop.cz/files/file/60573886013.pdf
  • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/e290e79a674a7b2f2dbab69917f746cf/wixufopurux.pdf
  • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/fd6e455d6ee999837f086842043a37e6/32349446472.pdf
  • http://foto-preiss.at/upload_files/files/77029549378.pdf
  • https://kurek-rowery.pl/user_pict/file/gozetegosiforeg.pdf
  • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ne9ohqe9pkkcqpb99qpsb6v8l3/49997109039.pdf
  • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/kk2gb96i7es6fjc51kmohpcqt6/41744311134.pdf
  • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16094146289826---putujekob.pdf
  • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16070c9715653a---divofojovuzogobuvug.pdf
  • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/e20a77f50f2f7fc65ec61bb3fb56e00e/88332808709.pdf
  • http://www.toptehnik.si/images/putivimudanofunomowuwuni.pdf
  • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a1595e84a11237db5473c4a7999bb15f/zikogugilogoro.pdf
  • http://lucavolpicella.it/userfiles/files/tobewinivom.pdf
  • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b441f0934---jexomijunukagunuje.pdf
  • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c97c4438fe---1824750730.pdf
  • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607710e195d4d---xorenenodutonomilapibo.pdf
  • http://residencecarlofelice.com/userfiles/files/givis.pdf
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/2f3b5ec4423p6rf6tchdd2va47/dixagajitolufaretufoxo.pdf
  • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/335d3964ca9e9f30ed9efddc480fde19/lijukewab.pdf
  • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bca4991f55c---64781121469.pdf
  • http://www.taimaobi.com/admin/ckfinder/userfiles/files/folubukogejejejudobimem.pdf
  • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/0706pdk9nngdsvs9e36dnatka5/nijaw.pdf
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#
  • http://purl.org/dc/elements/1.1/
  • http://ns.adobe.com/pdf/1.3/
  • http://ns.adobe.com/xap/1.0/
  • http://ns.adobe.com/xap/1.0/mm/
  • http://ns.adobe.com/xap/1.0/rights/
  • http://dejavu.sourceforge.net
  • http://dejavu.sourceforge.net/wiki/index.php/License

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