Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e6d11ab4e840e2…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 05:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: caa8b4d5a9cfeba668498c5bf7868be0 SHA-1: a2ed7f8a81f1bbe58827d7e5cc677235c5e4fdda SHA-256: d5e6d11ab4e840e299a71b4b3c9142c343cadaacd26bb110e5a961eb8f2be79a
132 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript, which is often used to exploit PDF vulnerabilities or redirect users. The presence of multiple links pointing to compromised WordPress upload directories and disposable hosting suggests a link farm designed to obscure the ultimate destination, likely a phishing or malware distribution site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3846

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610cae7d0c116---35547432099.pdf In PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33f18434b3---56652079215.pdfIn PDF document text
    • http://studiofantino.it/userfiles/files/73320707713.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/89945009720.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/foxanebi.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608450e833d7c---55092704741.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/3fadef8685ab9b317baa541f4a4e1d36/kajelagejosud.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/baliranadodugetap.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a14023faee---pofidakunokababa.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/74764063267.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/wolavitutunibisap.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/takomedesi.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c92c856f38a---jinikekixogimituvokegeka.pdfIn PDF document text
    • http://petrduchek.com/files/vagumevalakememozusonize.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//jojelefepuvatokeloja.pdfIn PDF document text
    • http://china-zzld.com/uploadfile/file///2021060220005989.pdfIn PDF document text
    • https://www.jdconstinc.com/ckfinder/userfiles/files/biretifediratinuselerix.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/98182fc328fc30683d1b4d07cf0c7b93/musoni.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/60699068425.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/votiwimodafida.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/93925313527.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac189a962f---xaripapojezagijagafaja.pdfIn PDF document text
    • https://mednet.mk/public_html/upload/userfiles/file/83653874199.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160957fab87f97---90736887580.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cdacd32fa48---gabagofun.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ce99a939d---91331141238.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=stadt+z%C3%BCrich+wohnungen+pdfPDF link annotation

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