Malicious PDF — malware analysis report

Static analysis result for SHA-256 45b2c961d26fb487…

MALICIOUS

PDF

48.4 KB Created: 2021-08-01 16:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 220ae60875a78cf05e69498ef156ef6d SHA-1: 7c8fa3ab67d781df4368f265bf51ee18428b9609 SHA-256: 45b2c961d26fb48794ba355579701a5abc17c014e3c8a21051fa75580d982224
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to lure users to malicious content. ClamAV detection as Pdf.Phishing.Trojan and ML classification further support its malicious nature. The presence of numerous external URIs and links to disposable hosting indicates a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7855

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 http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/f1lkenl07qsrc0brpd3gvgtjs3/80532559698.pdf In PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bf49d1462---razazuvifetusenomukik.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/b29b4aca7ecb25215f610302fd50a287/rarug.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160afdbc95640d---92307438464.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/fdef3f869830e27fd1b09ad5267b434f/dijanad.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/56164209072.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/zizepituvasunuguvitipaxe.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afc2013c0b4---fepumusu.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/40554525240.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609daf836e558---83001717870.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d6c900e27---52610469554.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/kibepizumebi.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622401257790932613.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=descargar+mi+primera+encarta+2009+por+megaPDF link annotation

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