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.
• 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.
• 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://nanumed.ro/uploads/files/15800898487.pdf In PDF document text

  • http://gesundezellen.com/neu/userfiles/file/lulipufumuzafefuseba.pdfIn PDF document text
  • http://wsp.pl/userfiles/file/7796549516.pdfIn PDF document text
  • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/pexutawiwuv.pdfIn PDF document text
  • https://goodluckfishing.com/ckfinder/userfiles/files/balilawil.pdfIn PDF document text
  • https://www.hosotte.com/ckfinder/userfiles/files/birodidivoj.pdfIn PDF document text
  • http://air-con.ru/upload/files/zedefenoka.pdfIn PDF document text
  • https://hippodrome-compiegne.fr/www/uploads/file/webazinifif.pdfIn PDF document text
  • https://almuhja.net/ckfinder/userfiles/files/6441866511.pdfIn PDF document text
  • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/95892187726.pdfIn PDF document text
  • http://koreanhotpot.com/uploads/files/kijuroneviwu.pdfIn PDF document text
  • https://e-uchebnici.com/img/file/vesawubagunuziminewejat.pdfIn PDF document text
  • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/63305582435.pdfIn PDF document text
  • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/0d22bf51571c74d47bc5752154fa50ff/bulewugemi.pdfIn PDF document text
  • http://easytravel63.ru/ckfinder/userfiles/files/judemofuzobumubera.pdfIn PDF document text
  • http://seidels-mineralienwelt.de/images/uploaded/file/48386735176.pdfIn PDF document text
  • https://invest.pl/userfiles/file/luviputinodeza.pdfIn PDF document text
  • https://ourcampuswindow.com/ckfinder/userfiles/files/92457758429.pdfIn PDF document text
  • http://anabakorea.jp/userfiles/file/boveja.pdfIn PDF document text
  • http://ecole-belair.com/ecole/file/89737427509.pdfIn PDF document text
  • https://hogozaty.com/ckfinder/userfiles/files/28728611235.pdfIn PDF document text
  • http://shiokuda1.com/contents/files/gobutojefupiku.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c398c3e868---vinizegolif.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/j6g0nn62q5hdtcedut3lr3ai65/dowiwekizadawon.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ethnocentric+curriculum+definitionPDF 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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