Malicious PDF — malware analysis report

Static analysis result for SHA-256 5303bc7a25d44b5c…

MALICIOUS

PDF

64.0 KB Created: 2021-08-25 03:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4707d4d4d00a2e21388bb439de6bf4fc SHA-1: 4d2c119bfe9217a22f28dfe7c765c992f50168f9 SHA-256: 5303bc7a25d44b5c04b7f4c3dd0f6992881e50c869df1e03d5b0aa692c5317dd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9582

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://medvor.ru/uplcv?utm_term=cold+reading+statements PDF link annotation
    • https://diedacorporation.net/freesiafiles/file/62469665822.pdfIn PDF document text
    • http://learningkey.org/userfiles/fozobajimuvazorok.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/xizafurasulitebefaruli.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d08814009---11318479404.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/4us7qcmh4tnnivo69sm5sg7r1c/pufulumazuletamujidu.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dakeforekajebu.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/77083269430.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/1431ef531acca6ef611ede9e35ffaea7/82443153198.pdfIn PDF document text
    • http://vinhthuan.com/upload/files/74226678542.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/xexijozid.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/19830787218.pdfIn PDF document text
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/43651854292.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/xosomisolekejat.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1609b294fadc34---dozikilosu.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/juzima.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/70384551137.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/jsfcurfllnv8gu1dorqudh4i4n/josaravelaf.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/5iltfmd6lgo5k9c0dpm1rengb5/zapujatulif.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608604ba3eb47---16462877023.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/47412674853.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210619070621_s0vlnk.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/i7camma7tl9ojk2mrlvqb4f3g1/vurimojiwetinupoledageku.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0ac077d53c45666be26a1b64136267da/vewaneb.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/dubusomej.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7d3079d539345b622fbc760d2c9ef7d7/518610352.pdfIn PDF document text

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