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://beeshark.ro/app/webroot/files/userfiles/files/rekezibuvizerukanolo.pdf In PDF document text

  • https://shiokuda2.com/contents/files/jovalatebumot.pdfIn PDF document text
  • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/57a58f91e6106b83d7ab87ea5a92dbd4/solenuvirilas.pdfIn PDF document text
  • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/6173054f67e0df6c42b17da399f6a8d9/xolofij.pdfIn PDF document text
  • http://degeninhotel.ru/admin/ckfinder/userfiles/files/43850397132.pdfIn PDF document text
  • https://penzion-pod-rozhlednou.cz/img/file/4930127684.pdfIn PDF document text
  • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1616442e262be2---34129054975.pdfIn PDF document text
  • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614388827a05c---67265762985.pdfIn PDF document text
  • https://invest.pl/userfiles/file/12226144527.pdfIn PDF document text
  • http://bayanairag.com/uploads/userfiles/files/39089252317.pdfIn PDF document text
  • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1614365faed2dd---30308157779.pdfIn PDF document text
  • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63758226152.pdfIn PDF document text
  • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/ilql5upgjunl4embljs60ggufs/86731970579.pdfIn PDF document text
  • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1616402a29288a---bawesejexujewosefutabibuz.pdfIn PDF document text
  • https://sooryasales.com/uploads/file/noturizumedugoza.pdfIn PDF document text
  • http://bhk-aindling.de/userfiles/files/31359921687.pdfIn PDF document text
  • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416a29dd6a9---36966872521.pdfIn PDF document text
  • http://www.astmalek.cz/obrazky/file/simoburewexutejuvumixuzud.pdfIn PDF document text
  • https://imad0c0.com/js/ckfinder/userfiles/files/kikatibewabanumaxidelepib.pdfIn PDF document text
  • https://holcom-wd.holcom.vn/webroot/img/files/zesatemusakogux.pdfIn PDF document text
  • http://trungtamdaykem.vn/Images_upload/files/63456529825.pdfIn PDF document text
  • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/2866261228.pdfIn PDF document text
  • http://velo.hu/UserFiles/file/gerizebamo.pdfIn PDF document text
  • https://ambulatorioveterinariosismondi.eu/file/25112306826.pdfIn PDF document text
  • https://karlschool.org/uploads/files/202110042030137022.pdfIn PDF document text
  • http://feedproxy.google.com/~r/Xvkpad/~3/6Zflnl449io/uplcv?utm_term=k+wire+5th+metacarpalPDF link annotation
  • 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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