Malicious PDF — malware analysis report

Static analysis result for SHA-256 4327f6a34dad6d0a…

MALICIOUS

PDF

47.7 KB Created: 2021-06-29 02:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 06930fb5915e70a8eea381025b28b32f SHA-1: 93006358dec29748197b89215aa8bfd16f085dc0 SHA-256: 4327f6a34dad6d0a5b6c1d5fd119c023b0bb6f1b621a51c8e7ccc84d302a4732
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised WordPress sites and utilize 'utm_term' parameters, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://philabc.ru/uplcv?utm_term=changing+nouns+from+singular+to+plural PDF link annotation
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a798cb1139f---32351568614.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/25899129707.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb7070deb4---jazina.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/47944852986.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/c8ad50d9704bd689926013ad92ab108c/69568299856.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/62021648734.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/24778547206.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/2209912342.pdfIn PDF document text
    • http://air-ned.com/uploads/files/lagalabegadivewas.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3cd736cf411e55bf54faba2ef8c36569/74883847191.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/1uh67faii9db90c4m48ecbhbet/87293693387.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/18749008695.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607af54e3e1d9---fiwabavunobadumeral.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/1m249as7hcfi520p2cqg78t2pa/34781104121.pdfIn PDF document text
    • https://aspirans.com/files/file/fefelililodovu.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/bc3b2f22ad43925aa5283ef87a251e52/ledisafotowisigagog.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/52964074954.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/bi6q1tcl4j4ga8lncltlp0ftsv/bituzuvovapagade.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d195dab8b2---75499167338.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/5c2c059dc80b9c371e06fd19f29ceac2/poreguwifutud.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ecnugqvaba0c7evr0a3lgbcu7/duvoxepavil.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d753d6a06d---42635234315.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160921b6424f02---kukirige.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abafb2b6c8c---16748036315.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/kobaba.pdfIn PDF document text

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