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.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• 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://archism.ru/uplcv?utm_term=infeccion+de+las+vias+urinarias+bajas+pdf PDF link annotation

  • http://dataction.org/demo/dataction/media/156643236.pdfIn PDF document text
  • http://turbotechnik24.de/userfiles/file/92489685846.pdfIn PDF document text
  • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/s511rde6tpckdvqjd6hkn81b52/2979366946.pdfIn PDF document text
  • https://mkart.it/uploads/file/xorelumuzonumifu.pdfIn PDF document text
  • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933883e42e3---zoriwevej.pdfIn PDF document text
  • http://www.ramseier-appenzell.ch/elrada/js/ckfinder/userfiles/files/63369148748.pdfIn PDF document text
  • http://bassbasement.org/userfiles/file/77029422608.pdfIn PDF document text
  • http://win-sonic.com/kida2018/ck_imgs/files/dorisojeligupiwirabosipaf.pdfIn PDF document text
  • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c960921bbb---67867281128.pdfIn PDF document text
  • http://baovephuongtroi.com/vietkiendo/upload/file/93790667407.pdfIn PDF document text
  • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/45700596502.pdfIn PDF document text
  • http://thienlongadv.com/upload/files/13562792439.pdfIn PDF document text
  • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3fc1effddbccae8f37f587ee887dde78/76281081699.pdfIn PDF document text
  • http://developmentassociationofnagaland.org/nbloom/fckuploads/file/93823292728.pdfIn PDF document text
  • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1606db52a9b9b8---tazadoxutojetelaratida.pdfIn PDF document text
  • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa24d8d443---jemavux.pdfIn PDF document text
  • http://tzoetemondje.be/uploads/files/sedakajolikijutenixas.pdfIn PDF document text
  • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/bc1aa03b3448a02b7e6b998627a9606c/94014112289.pdfIn PDF document text
  • http://cpils.com/userfiles/file/88328326315.pdfIn PDF document text
  • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c090810c4be---notiw.pdfIn PDF document text
  • https://pernambucoimortal.com/imagens/files/20703870589.pdfIn PDF document text
  • http://grupophi.es/uploads/files/nesava.pdfIn PDF document text
  • http://bajcsidavidfoto.com/_user/file/pofovom.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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