Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c999537972c2218…

MALICIOUS

PDF

64.0 KB Created: 2021-07-04 16:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e50d68c6d22ea32dbb3f77b4d8fdfb85 SHA-1: d8473f8aef32f355135303bd800745cd9492754f SHA-256: 6c999537972c22180fa52bc167f066b8130d525d90f325ef1ce9a0a5824a8ee2
124 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV with a signature indicating it is a phishing trojan. Static analysis revealed numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or SEO manipulation tactic.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

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://medvor.ru/uplcv?utm_term=sonic+dash+unlimited+red+star+rings PDF link annotation
    • https://fo-prefectures.com/pages/files/fegexarabasiwufevazida.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085d2a2466d1---rutomevebanur.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf800d52f03---24658297713.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/nukaruwovepofeboluvo.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/9ekhsot42crelt60rvra6s7e2u/gawekepilebefunagijazoran.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/aec7ece8a4c11a056f79513c97b51ca5/tejofewekowaxonowuw.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mvj10a37v1egtmbq56gnbnf0u3/17984763358.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/34132179e48c67f6b73320a7a753fbd9/beguxelaxubamezakagoku.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6d5b85390---woginuwoworolisem.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c901f639b3b---jasogalidamusava.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01a8fcd9cf---68585943319.pdfIn PDF document text
    • http://qlinairnv.be/userfiles/file/40748566919.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/e3fcfc0ec3e54f2a54664e97427424f5/dumegivosukurususefo.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7c9cbc5b9e189ba0a10eb593f01bc23f/bidirogimenibusowuzin.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/311d0d8fc67975f0e58e809c38877009/48670737630.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lhtnu3lqmjgk2j1f3uu7k18762/3037245364.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/mawedevetoliraju.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b06817c98e8---61280591608.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/bhhqodgtn40agj1qvfaqmhnokp/52412625974.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/34693bdbcf0c5a0d7585fd2a50a7572d/42865472735.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083559a31bb4---loveludatobowubim.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/32897260502.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/61c7927a56c8be320ee461e2b435b485/kilewefowuveb.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088336fb00e0---91875444823.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/40153764462.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/jezevolemowezenexapapilad.pdfIn PDF document text