Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5e519bc7684bca…

MALICIOUS

PDF

54.0 KB Created: 2021-06-30 10:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d209458a0220e82fa28593495d4e1020 SHA-1: d54fd2714c7429f1e4cdd6dd83d89f26c46a62e2 SHA-256: 3b5e519bc7684bca64791b68da6f96547c058b92fd4e55da1895c907a322ac56
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link farm pointing to multiple compromised WordPress upload directories, indicating a phishing or redirection attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's purpose is to lure users to these external links, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4912

Heuristics 5

  • 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.
  • 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://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7427d03fe---92205253355.pdf In PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ujub96sqk9ikdtksfth73tj6tk/piteserisofiga.pdfIn PDF document text
    • http://mopron.ru/upload/files/32561185790.pdfIn PDF document text
    • http://dzbnf.com/upload/file///48381211999.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/welidezitomujevowalurijuj.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/47690940745.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/4311f60bea65c68c7ab352d814bb1633/59191871349.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085822fc73be---velewepadixesop.pdfIn PDF document text
    • https://togeltop.net/contents//files/19747791264.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55d047bc52---likawolepitaroxilowegi.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f79eb98626---nunol.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf7b3b84b1---likixukuzuwubimepofixuvos.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/54a794e7eabd1c836ead0bb0f5210662/17399499904.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/9314915692.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/de86dbdd20a19206b4036edcc8c33518/10402486326.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b50c390cfba---notemusapezideneneb.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/e859e9eb26f45db34de5793c205ed895/raxizuguvinalarabinat.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160791e03ab684---delafonojubaf.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160972e39bafb4---65396266757.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/xawurovu.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4e85216796261f4f768800728fb159da/raxaluzipuvugobel.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/fagijefidanubebiro.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/8326ecbfd366ad32795e24df80509f7f/garagejufasux.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098c877aceaa---ripokosovef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+many+black+cards+are+there+in+a+deckPDF link annotation

Related samples 8

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