Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca06e5a8a124697d…

MALICIOUS

PDF

46.1 KB Created: 2021-09-07 10:17:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ecccf7ce70f7c104a668c775dd631268 SHA-1: b66f23686be069230150210d5ca74cbd0495ff20 SHA-256: ca06e5a8a124697d39c4ffb3b19d79470c40d480535538ae13aaa9e3fff6eb9f
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable domains, likely intended to lead users to malicious content or phishing sites. While no scripts were directly extracted, the nature of the links suggests a potential for further exploitation or download of malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://sibinetweek.ru/userfiles/file/33318360379.pdf In PDF document text
    • https://maintogelonline2.com/contents//files/22901111425.pdfIn PDF document text
    • https://vico-domrep.com/ckfinder/userfiles/files/wanifupunikuxuj.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac44b747f7b---xerobadawuzufogilowu.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/wotuvesekoru.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/98768107027.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eec0d06712---lumazez.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16098343ed9da4---bimanutezemupapewur.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/25716287487.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/d1gqdm8nes1562cdjrv675pk99/71465907682.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c85bcead8f---tafavosoribegova.pdfIn PDF document text
    • http://szpk.hu/_user/file/zogavewikolud.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086b8ff21917---71032712229.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/24576409833.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/pcqjo1m5l2o4skfnua0rcl03nk/nimudumive.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f5eb41876---gemeposofonejedifilusok.pdfIn PDF document text
    • http://refta-bg.com/userfiles/file/17800306377.pdfIn PDF document text
    • https://stijsr.com/userfiles/file/76363588806.pdfIn PDF document text
    • http://sanmarinreunion.com/clients/c/c0/c0747301521b2fcd71a0106c9132c7e7/File/rixule.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/75471441142.pdfIn PDF document text
    • https://deepex.hu/hirek/files/7419066527.pdfIn PDF document text
    • https://yuanfuconstruction.com/ckfinder/upload/files/57454772284.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210705104654.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607d183f655ae---96007542685.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/xezovelemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=voter+list+2018+assam+dhubri+pdfPDF link annotation

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