Malicious PDF — malware analysis report

Heuristics 8

• 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.
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• 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 http://makeyourpartnermelt.com/userfiles/file/23126085845.pdf In PDF document text

  • http://zkojicin.cz/userfiles/file/4358043899.pdfIn PDF document text
  • http://resurrection-life.net/userfiles/files/pomubegijalajevagidavone.pdfIn PDF document text
  • http://adamlegal.com/userfiles/file/64343014687.pdfIn PDF document text
  • https://art4you.sk/editor_uploads/system/files/73415702183.pdfIn PDF document text
  • http://geodavidepini.it/userfiles/files/rijasesupetiv.pdfIn PDF document text
  • http://musicincw.com/fckeditor/userfiles/image/tuwafubanekixudalawiki.pdfIn PDF document text
  • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613b620b838dc---2542743338.pdfIn PDF document text
  • https://neurondevelopment.org/userfiles/file/5698167374.pdfIn PDF document text
  • https://wolfgang-photography.com/userfiles/files/73084035963.pdfIn PDF document text
  • https://stauber.lt/images/files/52782324389.pdfIn PDF document text
  • https://nstyapi.com/resimler/files/ripoxipixujigag.pdfIn PDF document text
  • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/47dfa296cdbf93e7989f6a3d9ff772ad/47027899170.pdfIn PDF document text
  • http://1careglobal.com/upload/files/20141660671.pdfIn PDF document text
  • http://lamorenj.com/userfiles/files/zirij.pdfIn PDF document text
  • http://clubselectionvoyages.net/images/file/rodovixigixigusorovexoz.pdfIn PDF document text
  • http://cncforginghammer.com/d/files/45207972441.pdfIn PDF document text
  • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc5d92bb8e---90106679247.pdfIn PDF document text
  • http://lucidareemantenerepavimentifaidate.it/userfiles/files/zuvuje.pdfIn PDF document text
  • https://roshnaai.com/ckfinder/userfiles/files/wagarozexutesozamajiwu.pdfIn PDF document text
  • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/bf5a800405b3a929920c6b6925f6fba3/bexinebal.pdfIn PDF document text
  • http://piannocreativo.com/js/new/fckeditor/userfiles/file/ruzudifozig.pdfIn PDF document text
  • https://www.rapn.ru/ckfinder/userfiles/files/15893281566.pdfIn PDF document text
  • http://studiodugnani.it/userfiles/files/82041815470.pdfIn PDF document text
  • http://eis-pieschel.de/UserFiles/File/fonilug.pdfIn PDF document text
  • http://metabolizmusonline.hu/images/upload/file/dorapomasiwuzamipimesuv.pdfIn PDF document text
  • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=project+qt+free+download+apkPDF 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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