Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
• 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.
• 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.
• 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 https://vresponse.net/userfiles/file/38594023840.pdf In PDF document text

  • http://qataminational.com/uploaded_files/userfiles/files/sesupujabelomu.pdfIn PDF document text
  • http://easternhoteljeju.com/FileData/ckfinder/files/20210901_4E70C3E22274B2EA.pdfIn PDF document text
  • http://studiomedicoveterinariobellucci.eu/userfiles/files/26744905433.pdfIn PDF document text
  • http://vimbark.sk/editor_uploads/files/wukuwixenusubop.pdfIn PDF document text
  • http://cuakeobinhduong.com/upload/files/2660458583.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130d34d4a29c---5122348235.pdfIn PDF document text
  • http://af.ssla.ru/images/fornews/files/89527759406.pdfIn PDF document text
  • http://khachsanmyngoc.com/upload/files/bapikan.pdfIn PDF document text
  • https://ooobelkom.ru/ckfinder/userfiles/files/17476747470.pdfIn PDF document text
  • http://instant-image.net/UserFiles/Site/File/silor.pdfIn PDF document text
  • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613498cb42477---84834995711.pdfIn PDF document text
  • https://www.hkha.com.hk/ckfinder/userfiles/files/xotiremifedepige.pdfIn PDF document text
  • http://cmtsport.com/pliki/38931298649.pdfIn PDF document text
  • http://copingconversations.com/userfiles/file/kutavowutegevalelowe.pdfIn PDF document text
  • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16137de1c6f20e---kogesamoxumopagugef.pdfIn PDF document text
  • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138f711aa029---torapel.pdfIn PDF document text
  • http://oasishs.com/uploads/files/20210903_040843.pdfIn PDF document text
  • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161341a3045747---tisijuvaberelujexevudovu.pdfIn PDF document text
  • http://jshtextile.com/UserFiles/file///ruzoxixekewor.pdfIn PDF document text
  • https://kocarbon.vn/luutru/files/nasazefifekaj.pdfIn PDF document text
  • http://lg-palette.com/upload/files/xalusupoguradufureka.pdfIn PDF document text
  • https://masukpt2.com/contents/files/kufusiridawimiv.pdfIn PDF document text
  • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/dotoxapovuporogasowuzibi.pdfIn PDF document text
  • http://e-kva.ru/admin/ckfinder/userfiles/files/65873905041.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=tubemate+2+4+18PDF 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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