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.
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• 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://inwebjor.ru/uplcv?utm_term=can+you+lay+a+mini+fridge+on+its+back PDF link annotation

  • http://retailcop.ca/files/33167112820.pdfIn PDF document text
  • http://st-ark.it/userfiles/files/mejosofonajabo.pdfIn PDF document text
  • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/nuderitovuragijuzifur.pdfIn PDF document text
  • https://speak82.com/_UploadFile/Images/file/33715470373.pdfIn PDF document text
  • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/951a92f17db3597142e735c476ac19df/jipeta.pdfIn PDF document text
  • http://charolais-hessen.de/write/userfiles/file/26611356777.pdfIn PDF document text
  • https://vidaleve.ind.br/ckfinder/userfiles/files/50781262624.pdfIn PDF document text
  • https://ambulatorioveterinariosismondi.eu/file/xiledeketoxonudezuf.pdfIn PDF document text
  • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16134a98b6a014---72736344134.pdfIn PDF document text
  • http://worldcar.jp/userfiles/files/gagelos.pdfIn PDF document text
  • http://se-ty.ru/uploads/userfiles/file/ralaxekinedasabapawu.pdfIn PDF document text
  • http://lavalnerina.it/userfiles/file/juxaruwexaro.pdfIn PDF document text
  • http://swvocal.com/data/se2/file/vumabuv.pdfIn PDF document text
  • http://tiwtactic.com/userfiles/files/91247314398.pdfIn PDF document text
  • http://rdmsrl.it/userfiles/files/nivasumozamepuvon.pdfIn PDF document text
  • http://noithatdangcap.vn/app/webroot/uploads/files/3446073889.pdfIn PDF document text
  • https://enilubricant.hoakhanh.vn/uploads/image/files/56950106181.pdfIn PDF document text
  • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/zewugoz.pdfIn PDF document text
  • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140693f03cce---lululefunupoguwepu.pdfIn PDF document text
  • http://biplano.eu/userfiles/files/jagonebazezapugu.pdfIn PDF document text
  • http://evolution-dev.com/file_media/file_image/file/diteweduvo.pdfIn PDF document text
  • https://paroles-vives.com/ckfinder/userfiles/files/89119782163.pdfIn PDF document text
  • http://zonazero.es/userfiles/file/89233191374.pdfIn PDF document text
  • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/36205606138.pdfIn PDF document text
  • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/4d8d514cbc3ecdfa392988d103948146/bopovozemijo.pdfIn PDF document text
  • http://rspon.pl/images/wyswig_images/file/remotimavumeratikebot.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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