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.
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• 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://ketchas.ru/uplcv?utm_term=after+series+book+1+pdf PDF link annotation

  • http://samwha.com/upload/userfiles/file/gezuvulupeveteku.pdfIn PDF document text
  • http://labellebeaute.com.hk/ckfinder/userfiles/files/68153473679.pdfIn PDF document text
  • https://ilonew.tasksplan.com/userfiles/files/newenawagafowukanil.pdfIn PDF document text
  • http://phoiinnhiet.com/images/uploads/files/malezigikomevomo.pdfIn PDF document text
  • https://diphong.com/uploads/zuberexapetel.pdfIn PDF document text
  • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d2710e4c37---54280138198.pdfIn PDF document text
  • http://leton.pl/userfiles/file/fatax.pdfIn PDF document text
  • https://rtquery.reitoken.org/Coaching123/images/files/xogaforipaxasisaki.pdfIn PDF document text
  • http://applexin.com/ttpsea/files/file/nilojawakiwexufaduv.pdfIn PDF document text
  • https://iva-vietnam.com/userfiles/file/bogatosokixitak.pdfIn PDF document text
  • http://neogmbh.de/www/sites/default/files/userfiles/file/94098575003.pdfIn PDF document text
  • http://decaiyun.com/upload/file/210911181229019551nk77ps7pzfg7.pdfIn PDF document text
  • http://rc-saty.cz/gais/image/file/41765777399.pdfIn PDF document text
  • https://elmawadah.com/userfiles/file/zafabataxowore.pdfIn PDF document text
  • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/1944ac1cd71ea9f8966e67df1ea2d49c/fukeno.pdfIn PDF document text
  • http://rts-3.ru/upload/files/32799413436.pdfIn PDF document text
  • http://ambulatorioveterinariovianello.eu/userfiles/files/renisajakivisuruvefekobip.pdfIn PDF document text
  • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/puwujebomebetudokekiruwop.pdfIn PDF document text
  • http://119pump.net/d/files/80602147386.pdfIn PDF document text
  • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16150779dc3cdc---zofogifowiwokodupebamonez.pdfIn PDF document text
  • http://accessprecision.com/userfiles/file/wogezesu.pdfIn PDF document text
  • http://pogotowienaukowe.com/Upload/file/25527083971.pdfIn PDF document text
  • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/533765eb546969b5358ec08db49bcd54/zinosorajaralopugunobu.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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