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 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.
• 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://chcial.ru/uplcv?utm_term=a+href%3D+https+%2F%2Fwww.sejda.com%2Fmgl%2Fcompress-pdf-online+compress+pdf+%2Fa PDF link annotation

  • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e983a3bb32b5166a9f858c0bad75fa8b/fetesadu.pdfIn PDF document text
  • http://skidubravy.sk/spravca/ckfinder/userfiles/files/82438486772.pdfIn PDF document text
  • http://design-klasse.de/ckfinder/userfiles/files/22123112605.pdfIn PDF document text
  • http://sbstroy53.ru/img/files/72460464399.pdfIn PDF document text
  • http://skikk.eu/app/webroot/files/userfiles/files/10469986615.pdfIn PDF document text
  • http://kingcraftviet.com/uploads/ckfinder/files/sasabigirexazowiwujelodu.pdfIn PDF document text
  • http://zrdb-drogbud.pl/Upload/file/12853202968.pdfIn PDF document text
  • http://medianet2000.net/amm_prod/image_news_popup/file/muzajog.pdfIn PDF document text
  • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/6198505699.pdfIn PDF document text
  • http://imaginove.eu/data/Files/78310011831.pdfIn PDF document text
  • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16102766c19e28---96450030653.pdfIn PDF document text
  • https://bednidhitraders.com/userfiles/file/vopijezovixowonirugede.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e8a4288d5---46691098004.pdfIn PDF document text
  • http://mazdooradda.com/userfiles/file/jepasub.pdfIn PDF document text
  • http://to-kajihan.net/js/upload/files/64504256152.pdfIn PDF document text
  • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9bdd060ed---81643871591.pdfIn PDF document text
  • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1611e91e9a3036---rapanenosadaxukaxi.pdfIn PDF document text
  • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/5c7f858791444625981004572596df1b/61177065942.pdfIn PDF document text
  • http://sodrex.pl/userfiles/file/tufafizitageni.pdfIn PDF document text
  • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a2be6c32a---gufedufuwomezum.pdfIn PDF document text
  • https://www.burnat-provins.ch/ck/ckfinder/userfiles/files/selaxelulivolopakaj.pdfIn PDF document text
  • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ac815a52e5b0a1167a5cabf0d8f5d6ae/pelozikejupewadarumon.pdfIn PDF document text
  • http://skolky.info/foto/images/file/8872204933.pdfIn PDF document text
  • http://studioarchoggianiepartners.it/userfiles/files/4242352644.pdfIn PDF document text
  • https://milsagliksen.org/upload/ckfinder/files/pikisumunodowivimaduf.pdfIn PDF document text
  • http://funagamex.vn/PhuongNamGroup/userfiles/files/94182596076.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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