Malicious PDF — malware analysis report

Static analysis result for SHA-256 1275ba879c55e02b…

MALICIOUS

PDF

51.2 KB Created: 2021-07-04 01:15:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 4793bd36209952a1d34717e1a5079e89 SHA-1: e19654ad297c3a7da38f0a8cc1037e4e35f45f5e SHA-256: 1275ba879c55e02b18698214603caa533cdb175082f263e2b0369e9e6e40c085
154 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7790

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://ketchas.ru/uplcv?utm_term=privacy+by+design+gdpr PDF link annotation
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/1103808400.pdfIn PDF document text
    • https://ecoretras.com/file/zegezedovajogovoximip.pdfIn PDF document text
    • https://area5srl.it/file/vipunogizowovitusu.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aaa5f9d7ed---70138085675.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607775668900c---pegawalomudaru.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/8ilahglao5p3rogr7g7hrjsbo1/zogamidojugimisutapatamot.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/e1e12ea906dea234f496d6f4d95d1fb2/toremijulagek.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/49376625250.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/93107bb1896791bc5a215aec50a2d931/38621117028.pdfIn PDF document text
    • http://unsersohn.ch/images/file/89916150352.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/e928313189f18f81eea6ee327bd0fd3a/45858927531.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/pisisegolikuxizoje.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c95e54a9802---25346309246.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085627d13726---59372900959.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba233109493---nejanujikowatadanum.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f26dd45762---nivetajetowijeg.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/somasexuj.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/1006274421.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/28055785545.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/f8d7c858e47dfabac1d6fddef6e2b520/turizesegi.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/reputuxeronejuz.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/191714197511.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/421392ca0758b553d9b04e06ae8d6c01/lewisavajobolefa.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160b86aa4c47b7---56690718784.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06d60822a---reruj.pdfIn PDF document text
    • http://www.reenactmentmarket.eu/images/wyswig_images/file/lutolazigafezel.pdfIn PDF document text

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