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://krisoc.ru/uplcv?utm_term=information+communication+technology+in+distance+education+pdf PDF link annotation

  • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/u52u5f82goa7e0d2uosqiv1kh0/205528705.pdfIn PDF document text
  • http://paulabenveniste.com/UserFiles/file/89815640817.pdfIn PDF document text
  • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ebe57ecace889175d06a187e33d0fed3/70905942580.pdfIn PDF document text
  • http://allamericannursing.com/userfiles/file/41651488548.pdfIn PDF document text
  • http://eurogeographyjournal.eu/admin/fckfiles/file/45821335111.pdfIn PDF document text
  • http://aircond.md/upload_fck/file/69133024766.pdfIn PDF document text
  • http://solarhomepage.ch/fckeditor/editor/images/file/nulotidovevurotonaza.pdfIn PDF document text
  • https://folklorebridge.eu/uploads/pictures/files/82232290841.pdfIn PDF document text
  • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05592ce267---65462574060.pdfIn PDF document text
  • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c03478774---jemuveba.pdfIn PDF document text
  • http://provia-events.de/pics/fotos/1/file/vujujirozirimonaxux.pdfIn PDF document text
  • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/02c7acd75ef09339ff9a28b32f7710f3/rowekopizuso.pdfIn PDF document text
  • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/6hg0qp4tkjso4l4et3vsc5gu7n/14878331560.pdfIn PDF document text
  • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/25740657223.pdfIn PDF document text
  • https://eseninternational.com/uploads/files/tukeliwaboduga.pdfIn PDF document text
  • http://ghinelliarchitettura.it/userfiles/files/72275963273.pdfIn PDF document text
  • http://izumrud38.com/ckfinder/userfiles/files/81757645164.pdfIn PDF document text
  • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9729d3c0---wupufiroxetetadelupezemi.pdfIn PDF document text
  • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c6437379c3c---kusowit.pdfIn PDF document text
  • https://samarthanamparisara.org/apadmin/uploads/userfiles/files/mejanexevowinavasuvesawaf.pdfIn PDF document text
  • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b63061e80---wiludovowuximalotab.pdfIn PDF document text
  • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/ae6ae431609ce75f901b17b932f9b33c/19236386994.pdfIn PDF document text
  • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16088f87201242---34259404700.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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