Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e864a435e62ca9…

MALICIOUS

PDF

53.0 KB Created: 2021-06-08 02:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27a8a5ebc7cf8c6edc9c0d1cb0ee7ad5 SHA-1: caf964a17ff8ed672d7134995d6105b760f58c54 SHA-256: e7e864a435e62ca9fff97bae7aa621e3e94fd1484be9566f8876b31476902afd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and links to compromised WordPress upload storage, indicating a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malware delivery or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6427

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://coretry.ru/uplcv?utm_term=days+of+the+week+worksheets+kindergarten+pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f2b799b8d---zogomur.pdf
    • https://artasedanasingaraja.com/uploadfck/file/16657131626.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbb2c0e0757af3309c0de4780ffb9237/58635454485.pdf
    • http://gancza.pl/userfiles/file/gebotufizizitureb.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/8aecd12d0daf336986c2c1a5429ea388/22425932389.pdf
    • http://exmar.it/foto_fck/file/muregibikazodatozerelid.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/kubesurilodib.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609448a519462---nekitawatupadodud.pdf
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/2ad6d7501b7d0d6d0ecbe995365fe4df/peziwe.pdf
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/gokib.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/78732325469.pdf
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/6eb816b30a76837f254849342e6ec641/vewukokapojinisuxilorew.pdf
    • https://soechi.net/userfiles/file/jurunofamufaj.pdf
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/7476703a5362927d512615d058f938bd/fufisijosoxuf.pdf
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d532df272174bb87c76632c06f8617a4/gatajugiduv.pdf