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://synerhu.ru/uplcv?utm_term=samsung+experience+home+apk+download PDF link annotation

  • http://ambulatorioveterinariovianello.eu/userfiles/files/sozudije.pdfIn PDF document text
  • http://cancercareresearch.com/userfiles/file/15973145606.pdfIn PDF document text
  • http://sterenstein.ru/userfiles/file/58552925664.pdfIn PDF document text
  • https://frisch.ro/files/file/92322820014.pdfIn PDF document text
  • https://santa.sg/images/users/00000000/files/pabate.pdfIn PDF document text
  • http://allineers.netlovestories.com/upload/files/16616151149.pdfIn PDF document text
  • http://diennuocdanang.com/uploads/image/files/78197645155.pdfIn PDF document text
  • http://yurisolomko.com/userfiles/file/jesekokitoret.pdfIn PDF document text
  • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/1614554ed2ec0c---rovefubafiwoxifafoxa.pdfIn PDF document text
  • http://lscapital.it/images/file/napugub.pdfIn PDF document text
  • http://studiostocchi.eu/userfiles/files/25205333457.pdfIn PDF document text
  • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e9f0fb366d---41188441440.pdfIn PDF document text
  • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/latofimoveru.pdfIn PDF document text
  • http://acsalma.hu/userfiles/files/41831625913.pdfIn PDF document text
  • https://dolnoslaskialarmsmogowy.pl/imgturysta/files/55169119070.pdfIn PDF document text
  • http://drukarnia-skawina.pl/app/webroot/media/files/54646104465.pdfIn PDF document text
  • https://es21sys.com/userfiles/file/mozadonefetedodisedixa.pdfIn PDF document text
  • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137eae98130a---47983951539.pdfIn PDF document text
  • http://balbu.hu/uploads/news/file/44542210097.pdfIn PDF document text
  • http://softwarefactory.nl/images/file/jifetu.pdfIn PDF document text
  • https://pieseautocomenzi.ro/userfiles/file/82065774511.pdfIn PDF document text
  • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5bfa4e17d---silaguvotobijezapuzazakup.pdfIn PDF document text
  • https://renfrewareahealthvillage.ca/ckfinder/userfiles/files/betebopuxonosu.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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