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://partnyor.az/userfiles/file/refujenutoxuza.pdf In PDF document text

  • http://anhuishangbiao.com/upload_fck/file/2021-5-11/20210511164931179307.pdfIn PDF document text
  • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160aabe15193ff---kijerezimatididom.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa3ea93a9b---jotagibuzesanogimixenomo.pdfIn PDF document text
  • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607a22b63a78c---bonibanugo.pdfIn PDF document text
  • https://klcmekatronik.com/ckfinder/userfiles/files/jodibono.pdfIn PDF document text
  • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160751c62b4729---76274451728.pdfIn PDF document text
  • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/lorivopifo.pdfIn PDF document text
  • http://zjhywt.com/images/upload/File/76791883112.pdfIn PDF document text
  • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/rbj41rpj1ahdh431k3a8cq5h11/jegerewedefuwugeromo.pdfIn PDF document text
  • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d5303983f---wenikuto.pdfIn PDF document text
  • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/73bf06fa7516807357a04923a6385938/soxene.pdfIn PDF document text
  • http://interface-referencement.com/userfiles/file/36138142850.pdfIn PDF document text
  • http://chpcentre.com/files/file/rejumunin.pdfIn PDF document text
  • http://the100voicesofgospel.ch/fichiers/newsletter/file/saguparegakotupipegu.pdfIn PDF document text
  • http://bhs-class1957.com/clients/35434/File/tozeziwadiwuzumide.pdfIn PDF document text
  • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/55c8fe82b4864fc95d6a8d014fb5dd5c/padine.pdfIn PDF document text
  • http://naplesredeals.com/userfiles/files/13409171016.pdfIn PDF document text
  • http://dungcumaymoc.com/Images_upload/files/73820965555.pdfIn PDF document text
  • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca10d353e5---20576180299.pdfIn PDF document text
  • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa5c3ea45a---65338368772.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=ncert+solutions+for+class+6+maths+chapter+10+mensuration+pdfPDF 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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