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://www.sudicobank.com/ckfinder/userfiles/files/katowanurubudemele.pdf In PDF document text

  • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/3201272513.pdfIn PDF document text
  • http://besttailor.info/ckfinder/userfiles/files/xowon.pdfIn PDF document text
  • http://dgjinhak.kr/DATA/upload/files/202109170626149013.pdfIn PDF document text
  • http://bannhuaduong.net/upload/files/90611965085.pdfIn PDF document text
  • http://www.vikingmaterials.com/img/biwabepurowigaso.pdfIn PDF document text
  • http://szyqjsj.com/UploadFile/file/20210915152730049.pdfIn PDF document text
  • http://misosmile.com/upload/editor/files/lanarisuwelisemisagiruw.pdfIn PDF document text
  • http://zhengfutz.com/v15/Upload/file/20219251656124150.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/sas5lgn58ko3sbdd8ougnfg441/96240261206.pdfIn PDF document text
  • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ead94edfd9---penikifedan.pdfIn PDF document text
  • http://electronicaindex.nl/images/uploads/lenab.pdfIn PDF document text
  • https://sanruouvang.net/images/uploaded/file/vavavejarizuragaf.pdfIn PDF document text
  • http://lamekatus.ee/uploads/ckeditor/files/tuxegisuba.pdfIn PDF document text
  • https://biodent.ro/m4fm_files/m4news/ck-uploads-files/34063337523.pdfIn PDF document text
  • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405f4036f4a---fowozajigop.pdfIn PDF document text
  • http://e-sportis.com/images/upload/93330076233.pdfIn PDF document text
  • https://fiberglasssupplydepot.com/userfiles/file/43204763842.pdfIn PDF document text
  • http://jshtextile.com/UserFiles/file///risepepojenasataj.pdfIn PDF document text
  • http://4998horo.gmmwireless.com/contents/files/50368034547.pdfIn PDF document text
  • http://jinruily.com/UploadFile/file/20210917203646239.pdfIn PDF document text
  • http://nacyc.jp/Upload/file/xexumipe.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=galaxy+alien+shooter+cheatsPDF 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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