Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2310ce3c416c49…

MALICIOUS

PDF

59.9 KB Created: 2021-06-12 13:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff44086c19da44a332d0caf2d918b1c9 SHA-1: dc253388933633d15cd4098784f783cbc6de49a1 SHA-256: 5e2310ce3c416c4969987daa0107a76041ea113f7227d1c8b53ead6a1a1185c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7213

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=1+block+skyblock+map
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160703a95ddcf8---64759122528.pdf
    • https://lawina-radom.pl/files/file/81278283978.pdf
    • https://vannordenvastgoed.nl/userfiles/file/gizipa.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606efd63a194e---milopefekinakebikozodajo.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099820185668---99027205421.pdf
    • http://bhttourist.com/upload/fckimagesfile/kazano.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160876854ba0d0---juzalibafepow.pdf
    • http://omonetach.pl/foto/ilustracje/file/soxuranososepagofuwi.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160b0846ed782d---pezokivu.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b73be602c6---24752612872.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/iitg9c52lucipdlr4h0qivapp4/73164372138.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-21/20210521001205723463.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/6aa690cf960205ebc372bf40cae6d2a3/58165474285.pdf
    • http://netinflux.net/userfiles/file/44798797613.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/c3jboe8f7cujlajdcmk8b0ocut/lalonuzibated.pdf
    • https://houstoncoinshow.org/FCKeditor/file/detomasamamofuz.pdf

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