Malicious PDF — malware analysis report

Static analysis result for SHA-256 568e8f4d3c00695a…

MALICIOUS

PDF

69.3 KB Created: 2021-06-18 19:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7ccec55a438145b069c82edac391912d SHA-1: be5cb95dd08dea0344f8454727e78fe615413ba2 SHA-256: 568e8f4d3c00695a20a4b475f052df5a07649628aa186d0fab190864eb61f2ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest the document is intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6161

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://oniceh.ru/uplcv?utm_term=new+english+file+intermediate+cd+descargar+gratis PDF link annotation
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/bb196stdo23j7d6jvr9lg3qq27/kopinene.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1622264384.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/5c3f39527c9d2eaf66734bbd2b2e7f8e/ronadari.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/741d9c6219c5fe236dee7d6786930f36/gusilipetixagopa.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/22758779088.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16076c2cb4571c---xodovo.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607246c818954---91999377105.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/fokadebilizopaj.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/fadoputuzira.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/5481179fedc248d786190dce29f64695/vilejivodawewizokupil.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30b3d0f09---boxijakuf.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/b37c9c058e503edd442f3cbdf12798aa/xorusimewojatojo.pdfIn PDF document text

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