Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ea2278da9bec5f3…

MALICIOUS

PDF

54.5 KB Created: 2021-06-24 15:48:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cf2058f17eda3a4fddd518e36df2bf8f SHA-1: 962c42250bb79909af1a4eb831ee5d0fb5ffe9e3 SHA-256: 8ea2278da9bec5f373cb2e32e4a46b439d653b19ed0afb4a366eefe007c043c5
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that function as a link farm, directing users to various external sites. Several of these URLs point to compromised WordPress installations, indicating a potential phishing or malware distribution scheme. The ClamAV detection and ML classifier further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6365

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://wastran.ru/uplcv?utm_term=iwatch+4+manual
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c131f419433---famujabokexevuxoneluji.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbb367d468---78930112236.pdf
    • http://hookmyweddingup.net/clients/73542/File/kudisejosedowiviwarofifa.pdf
    • https://faprosid.com/file/9363290301.pdf
    • http://446888.top/userfiles/file/98812288608.pdf
    • http://ktcz.eu/files/files/80877890493.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/hecj7nbcfi3cq86dl6ne4en7en/983915893.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/98919239584.pdf
    • http://ndt-tl.ru/upload/file/vimodurepu.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/hps0udf6lb7i8cqvjt4b29l82i/18607652748.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa9bfe53e7---pepidajod.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/kd48lg4jaqev3hpckphsqv15ci/38426513907.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/81c5bf8dc81109330788aedb5a5304f4/vukevojemasunu.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609be1a841fd0---zurenasunatesutofiso.pdf