Malicious PDF — malware analysis report

Heuristics 7

• 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.
• 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://rubfila.in/files/file/nixipudej.pdf In PDF document text

  • http://csc0532.com/userfiles/file/20210905181803_aph05c.pdfIn PDF document text
  • https://webvitamin.vn/app/webroot/uploads/files/16723261251.pdfIn PDF document text
  • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161411610b8c0f---14023712107.pdfIn PDF document text
  • https://nikoljski.com/ckfinder/userfiles/files/92611717263.pdfIn PDF document text
  • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/94051847707.pdfIn PDF document text
  • https://2winit.com/Files/files/xodikotufomozijamokakodox.pdfIn PDF document text
  • http://sanchariglobal.com/userfiles/file/detasugefopozodu.pdfIn PDF document text
  • http://lucidareemantenerepavimentifaidate.it/userfiles/files/bukagad.pdfIn PDF document text
  • http://gzperson.com/uploadfile/files/sogufakuribapekepobokem.pdfIn PDF document text
  • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2da55bf62---63649150737.pdfIn PDF document text
  • http://webinaris.eu/ckfinder/userfiles/publics/files/rifizavunulasewaxekosub.pdfIn PDF document text
  • https://wisestudentz.com/userfiles/file/kudenefetuwevokena.pdfIn PDF document text
  • http://cauthangdep24h.com/upload/files/40404209213.pdfIn PDF document text
  • https://foursservices.com/nbloom/fckuploads/file/24987505207.pdfIn PDF document text
  • https://stoneappeal.in/FCKeditor/file/21141613280.pdfIn PDF document text
  • http://avalon-essenzen.at/userfiles/file/lokopoziropubibu.pdfIn PDF document text
  • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/84679685554.pdfIn PDF document text
  • http://zussobrance.sk/grafika/dokumenty/96540758532.pdfIn PDF document text
  • http://union-montage.pl/userfiles/file/mumilubobizo.pdfIn PDF document text
  • http://bioaec.com/userfiles/files/54641634574.pdfIn PDF document text
  • http://stickerbarcode.com/file_media/file_image/file/zexomowugefobidopos.pdfIn PDF document text
  • http://wjvanderheidedienstverlening.nl/uploads/file/tuwojaxu.pdfIn PDF document text
  • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/inub1f10uuf47efcd7eb21a4bu/5612309422.pdfIn PDF document text
  • http://ebd.su/UFD/7623/files/42843336036.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=app+to+transfer+sms+from+android+to+androidPDF 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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