Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac996f3142a6b017…

MALICIOUS

PDF

47.0 KB Created: 2021-06-05 12:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 0d774738a2f751ac075abe76c1c183cd SHA-1: f427d471d2a578a0b54cfab0fb9b9077222e20be SHA-256: ac996f3142a6b017159e38962a7a22ed1bb5ea65ee422877c4be7797b802694c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations. The document body text, though heavily obfuscated, suggests a lure related to downloading a 'keygen' for Corel Draw X5. The presence of multiple PDF link farm heuristics and a high ML classifier score indicate malicious intent, likely to direct users to malicious downloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9327

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://huntic.ru/uplcv?utm_term=corel+draw+x5+keygen+free+download+32+bit PDF link annotation
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072fc88d4609---27245818485.pdfIn PDF document text
    • http://dhf-china.com/d/files/lebugipiluwi.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210604045708718500zl3r7l.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/116e43765fd7a44cb6b4b247f6c0a8a5/95262121236.pdfIn PDF document text
    • http://kangs78.com/clients/66216/File/kolufi.pdfIn PDF document text
    • http://billsky.ee/files/file/kuwebibekiwamosexeto.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aada5f14fa---45548301074.pdfIn PDF document text
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/12ca7ed89ba330cb3ea53e2f9768dbbf/95101346400.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0b212de395d16a24aac5a61096c49670/bizadagejametufilok.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d6699a0e9---59895532015.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/ac2b5d0c64ff4fa018d9d05f5ff1b9f0/76719687789.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kurazi.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/kixuga.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b7d2683ba---sipuxojevevatu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/df388b3518cefc0f9803a57aebfcffb8/77003343512.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/592c02dfdbcce0c68e4e5c334c17d208/sonatak.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/27191390338.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b348020af95---fubotalegedixititamokof.pdfIn PDF document text

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