Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
• 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://medvor.ru/uplcv?utm_term=iphone+5s+keyboard+for+android PDF link annotation

  • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/5090757513.pdfIn PDF document text
  • https://0800-707-808.com/upload/ckfinder_temp/files/20210909195148.pdfIn PDF document text
  • https://krainaogrodow.eu/zdjecia/fck/file/5108435095.pdfIn PDF document text
  • https://rm-parketi.si/uploads/muzuromimogobuz.pdfIn PDF document text
  • https://ratsimae.ee/media/contents/file/406788416.pdfIn PDF document text
  • http://iktoktatas.hu/files/file/61536200324.pdfIn PDF document text
  • http://analogsys.com/uploaded/file/18251887736132f22ac8337.pdfIn PDF document text
  • https://barcelonacentremedic.cat/files/galeria/files/78898207168.pdfIn PDF document text
  • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16139e741ecad6---9747748092.pdfIn PDF document text
  • https://www.netcorp.hu/data/editorfile/vibovujovaposuzosa.pdfIn PDF document text
  • http://kramor.bg/userfiles/file/70558208554.pdfIn PDF document text
  • http://ambulatorioveterinariovianello.eu/userfiles/files/zulijugavanorusutikotin.pdfIn PDF document text
  • http://evevoyance.fr/adh/.-/file/kanolemil.pdfIn PDF document text
  • https://anhhuynoithat.com/asset/files/wikebisekijesepef.pdfIn PDF document text
  • http://thietkewebbacninh.com/webroot/img/files/pijituxufuvivixapatowuki.pdfIn PDF document text
  • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1614c35036c75c---mamavuxojojonebozariresa.pdfIn PDF document text
  • https://robertbah.si/files/file/40253009406.pdfIn PDF document text
  • http://architectureanddesign.it/userfiles/files/vomis.pdfIn PDF document text
  • http://sudeoksa.org/userfiles/file/20210919105125.pdfIn PDF document text
  • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16134e9048b490---9145652571.pdfIn PDF document text
  • https://sma-dfgg.org/site/admin/file/31338750212.pdfIn PDF document text
  • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/cbe207e226981d52bc1d98cbfbc70697/pinifavuretazileveb.pdfIn PDF document text
  • https://unitjaya.com/contents/files/57231338886.pdfIn PDF document text
  • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/ughrb7enj15h4p00lsd45ullu6/fedegosupidupupoz.pdfIn PDF document text
  • https://jordanadams.com/ckfinder/userfiles/files/bifigigim.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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