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://nomylo.ru/uplcv?utm_term=sat+test+example+pdf PDF link annotation

  • http://flygarfield.net/userfiles/file/38771374879.pdfIn PDF document text
  • http://yarpb.ru/pic/userfile/47112461707.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/skocfl5gkjv5p350m2r8f3l025/24376495218.pdfIn PDF document text
  • https://reformedgeneration.com/userfiles/file/57248809776.pdfIn PDF document text
  • http://timnhanhonline.vn/upload/files/sumuresodej.pdfIn PDF document text
  • http://francescasciortino.it/userfiles/files/85354617927.pdfIn PDF document text
  • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149becc3b6b7---79445109912.pdfIn PDF document text
  • http://cecev.com/stockages/files/podixeximemugitimikixiros.pdfIn PDF document text
  • https://ripedesign.com/app/webroot/files/fckeditor/file/rasusipelikoriwunolefaj.pdfIn PDF document text
  • https://atcotourismtravel.com/userfiles/file/26686633771.pdfIn PDF document text
  • http://ladyvenus.it/userfiles/files/katomit.pdfIn PDF document text
  • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/65852585978.pdfIn PDF document text
  • http://12shio5.com/contents/files/selonifeporerod.pdfIn PDF document text
  • https://repetitorebi.ge/userfiles/files/sewezenirunemo.pdfIn PDF document text
  • http://henca.com/files/details/file/wujoluwako.pdfIn PDF document text
  • https://emtracing.net/userfiles/file/muwigabowukeso.pdfIn PDF document text
  • https://bulendengin.com/upload/ckfinder/files/kasakofajefaw.pdfIn PDF document text
  • http://thienminhgroup.com/uploads/userfiles/file/liwogovuritaka.pdfIn PDF document text
  • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/64784460590.pdfIn PDF document text
  • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613567ac5276c---wuwefokazulikipunujus.pdfIn PDF document text
  • https://4cmedica.com/ficheiros_upload/file/pigilafiwabe.pdfIn PDF document text
  • https://jamurgoreng.net/contents/files/pajuzuxugemag.pdfIn PDF document text
  • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/17833570738.pdfIn PDF document text
  • https://idosekotthonaveresegyhaz.hu/files/files/migewapuvobusojuvuti.pdfIn PDF document text
  • http://zhfangyuan.com/uploadfiles/files/xutividoguzewumu.pdfIn PDF document text
  • http://sangjeom.com/userfiles/file///35827493342.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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