Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7e8383dffd3425…

MALICIOUS

PDF

54.6 KB Created: 2021-09-01 22:47:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6e91a796695db929258148e7650772fa SHA-1: 20a79e8d00fc9e52562cca1fc6871c797600a907 SHA-256: fa7e8383dffd34259d15d2e8ecea06f05ade59e78859eebe1ff4175696b71cd9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The presence of PDF_URI and EMBEDDED_URL heuristics indicates that the document attempts to redirect users to external content, likely to download further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7218

Heuristics 5

  • 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 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
  • 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://drafthe.ru/uplcv?utm_term=uk+punk+quiz+questions+and+answers PDF link annotation
    • https://digireg.sk/upload/fabakimosox.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cce0ebe7717---toreranipakexexazikedegul.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/49712231756.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/fimine.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/sagibonukotal.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/ee69106a52047558296faa0ec450bcd9/91511491203.pdfIn PDF document text
    • http://avtrak.ru/ckfinder/userfiles/files/jiramaxawebepeluz.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/93602937234.pdfIn PDF document text
    • http://lhjmfamily.com/clients/5/5d/5d8645f74963a96e1aea25f3b610eff6/File/befinexoxolizujof.pdfIn PDF document text
    • http://ags-sib.ru/ckfinder/userfiles/files/jufapoteso.pdfIn PDF document text
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/35212960362.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/113cb529b08d86ddb07d0cab04f58399/fejusisunazinebaxuno.pdfIn PDF document text
    • http://iqlacpro.vn/emotive/upload/files/vojiximawox.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100c4e24f169---josofodifanunubadikapi.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/30779617418.pdfIn PDF document text

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