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 68 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://voziky-paletove.cz/mctree.cz/pictures/other/files/nibinezinosixogus.pdf In PDF document text

  • http://ahdongjiu.com/upload_fck/file/2021-9-17/20210917091758697153.pdfIn PDF document text
  • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/gesowugovek.pdfIn PDF document text
  • http://thebeautyofdesign.nl/ckfinder/userfiles/files/timililojiso.pdfIn PDF document text
  • https://foodexgida.com/uploads/files/marupofavi.pdfIn PDF document text
  • http://holidayinntorino.com/userfiles/files/48100570696.pdfIn PDF document text
  • http://kangshi-you.com/uploads/files/202109100713033918.pdfIn PDF document text
  • http://yjccnc.com/upload/files/54772851497.pdfIn PDF document text
  • https://rajaketiga.com/contents/files/3550854368.pdfIn PDF document text
  • https://smartbrand.ro/mm/file/leropakifawiguvuvod.pdfIn PDF document text
  • http://ilkconstruction.com/Images/Media/files/muxamilegatosibugajiramat.pdfIn PDF document text
  • http://carraracucinecomponibilitrapani.it/userfiles/files/57209703212.pdfIn PDF document text
  • http://casadiriposomarsala.it/userfiles/files/melamuzuxefuj.pdfIn PDF document text
  • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6ed8dcd6---9215138571.pdfIn PDF document text
  • http://hoadon-dientu.net/images/files/putelamamika.pdfIn PDF document text
  • http://sfipl.in/userfiles/file/98036323978.pdfIn PDF document text
  • http://mq-water.net/upload/75559261972.pdfIn PDF document text
  • http://phantasos.org/userfiles/file/2307020504.pdfIn PDF document text
  • http://hide-bo.com/img/tmp/file/2780845385.pdfIn PDF document text
  • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/a4d130a0c14ec364eb06555d065e1d57/lumar.pdfIn PDF document text
  • http://gzperson.com/uploadfile/files/bomitowuj.pdfIn PDF document text
  • https://penzion-pod-rozhlednou.cz/img/file/mutukizusinobutaji.pdfIn PDF document text
  • http://jodhpurheritagewalk.com/images/file/52099108770.pdfIn PDF document text
  • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c6b7f05bd6---ruwenadoriteni.pdfIn PDF document text
  • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=blue%26me+app+androidPDF link annotation
  • http://e1pl2.nazwa.pl/busy/fotki/file/89949271554.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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