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 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 68 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://cructi.ru/uplcv?utm_term=android+gyroscope+calibration PDF link annotation

  • http://geojeoceanhotel.com/userfiles/file/20210902070558.pdfIn PDF document text
  • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16131a8c8bb865---gigife.pdfIn PDF document text
  • http://sz-nuoyi.com/Upload/file/2021091119051099050.pdfIn PDF document text
  • http://satunatc.ac.th/ckfinder/userfiles/files/xaximawekinoxepugem.pdfIn PDF document text
  • http://oilmachineydy.com/d/files/83992181617.pdfIn PDF document text
  • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ace3d1092a---juwidezonokejojefabevuta.pdfIn PDF document text
  • https://diamond-marketing.cz/soubory/mamiraratoxaronowuguz.pdfIn PDF document text
  • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/14937bdfff9b73f8faddd3a14682ef3b/32600891495.pdfIn PDF document text
  • http://denetimmusavirlik.com/userfiles/file/delisam.pdfIn PDF document text
  • https://gretajensen.com/ckfinder/userfiles/files/vopasemeka.pdfIn PDF document text
  • http://www.tobywells.org/media/fckdir/file/29587710032.pdfIn PDF document text
  • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/7824326617.pdfIn PDF document text
  • http://clinicaveterinariailmarzocco.it/userfiles/files/20214794752.pdfIn PDF document text
  • https://kalyna.ua/sites/default/files/userfiles/file/61886840094.pdfIn PDF document text
  • http://sandlnae.com/data/editor/file/90705739920.pdfIn PDF document text
  • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/82689554015.pdfIn PDF document text
  • http://autobedrijvenindex.nl/images/uploads/30291465907.pdfIn PDF document text
  • https://ka-base.no/images_content/file/74419149755.pdfIn PDF document text
  • http://goldendoodlesofthesierranevadas.com/userfiles/file/60328039277.pdfIn PDF document text
  • https://printjet.pl/pliki_user/File/45333158485.pdfIn PDF document text
  • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16132c29420d66---16265098539.pdfIn PDF document text
  • http://sjccgy.com/userfiles/file/1973325790.pdfIn PDF document text
  • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613300e8e6b30---77662966204.pdfIn PDF document text
  • http://infiniti.e-library.tw/uploads/files/botobejowif.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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