Malicious PDF — malware analysis report

Static analysis result for SHA-256 1239a5dcdb44e6a7…

MALICIOUS

PDF

113.7 KB Created: 2021-06-19 07:53:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 38170ab5dc262fb117882d16cfa1c71d SHA-1: 2f7037c0bed73304d5e3766bba807e8f34da0776 SHA-256: 1239a5dcdb44e6a741cd9fba2e9810fa110e3b477557bdf9dc3989e08cb3559b
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to distribute phishing content or malware. The presence of numerous external URIs and link farm heuristics indicates a primary goal of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9456

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://nomylo.ru/uplcv?utm_term=shin+chan+in+tamil+shin+chan+in+tamil+shin+chan+in+tamil PDF link annotation
    • http://stlukesmn.org/clients/17773/File/73873336393.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/99361074504.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/j5p3g54938q36po0aq52e0iak3/63747776229.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099e2c553e50---vaketuwenuwakep.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/89649214586.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/3e55105d4f08f0e8722f8adc1d4c6945/burikodejenil.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fb41e2391---54398230589.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/zixeziximigukegalesu.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bea1011f4f0---minurisegat.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa0ce59c21---kexajetodedotukirekevuxom.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/s40f9ac5voqc1rpolsa8tm84d5/44043415273.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f48b61ae90---nuzum.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/272686988.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/d3uu88pdl9gjn7lo3b8avqka7o/34440380113.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/cldmelq9fud3ddulb6f5deiinl/fakamax.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1b48967b4---bokatazuguwanufo.pdfIn PDF document text

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