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 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.
• Callback phishing phone lure medium SE_CALLBACK_LURE
  Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
• 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.
• 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 http://vinhomeshaiphong.net/app/webroot/img/files/43714848441.pdf In PDF document text

  • http://agisma.ru/files/pages/files/94806416172.pdfIn PDF document text
  • http://secureyun.cn/uploadfile/file///2021101609121377.pdfIn PDF document text
  • https://efsanepin.com/calisma2/files/uploads/bigokiz.pdfIn PDF document text
  • http://rentbucharest.net/images/userfiles/95053426455.pdfIn PDF document text
  • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2fded730a5004767ff1cbbc45edba2e2/jimamap.pdfIn PDF document text
  • http://dkkarsin.pl/img/upload/files/fepopuwazid.pdfIn PDF document text
  • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/55212354801.pdfIn PDF document text
  • http://rasciindia.com/firetech/ckupload/files/pasefutuguregiselibu.pdfIn PDF document text
  • http://bhttourist.com/upload/fckimagesfile/7893275312.pdfIn PDF document text
  • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161764b0bc9662---83209745714.pdfIn PDF document text
  • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153ed440a0e3---mazegozomuw.pdfIn PDF document text
  • http://rapabzenec.cz/obrazky/files/86064580301.pdfIn PDF document text
  • http://muasamhangmy.com/ckfinder/userfiles/files/wevos.pdfIn PDF document text
  • https://tucarrorentacar.co/ckfinder/userfiles/files/64644595261.pdfIn PDF document text
  • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1615f612002d05---53592186977.pdfIn PDF document text
  • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c2b08f1cb7---99546746533.pdfIn PDF document text
  • https://reha.bg/content/upload/file/14110884890.pdfIn PDF document text
  • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/27303598305.pdfIn PDF document text
  • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16169d0efb289f---jonivolesosetumore.pdfIn PDF document text
  • http://unite-chem.cn/upload/files/28369712539.pdfIn PDF document text
  • http://stylekd.ru/files/tobiwub.pdfIn PDF document text
  • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/10336897217.pdfIn PDF document text
  • http://rockhousemethod.com/ckfinder/userfiles/files/66810284321.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=capital+gains+annual+exemptionPDF 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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