Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c4c5eb3d561c5b…

MALICIOUS

PDF

63.7 KB Created: 2021-07-25 15:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 53cb885f149d288b62d8634cca332c73 SHA-1: 8e7e5e54957dd29ad7e6f35ee7e3015d3c573220 SHA-256: d4c4c5eb3d561c5be2f7733dea5b1c857630a5303f176d8743f4a086604c14a3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. The file's structure as a link farm on disposable hosting further supports its role in directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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://ajtoablakcentrum.com/_user/file/64240418871.pdf In PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210606094535.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c7511058b---dutukexadelevofap.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/47949290243.pdfIn PDF document text
    • https://edcasys.com/ci/userfiles/files/bijawabosov.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/6435116508.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/55004493947.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/tuzodatavasujopekusibiwo.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/l0s342227iik33m2sm6k3no66r/didenezada.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b51167b8cf---lananonimomuxawud.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/zorodexomopemawudibexuk.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/88117455872.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/8be622aac31012e1d27c3fdf69399a65/xubexebelopebezagokutasog.pdfIn PDF document text
    • http://trendybiz.in/usersfiles/file/midiziwodigasanazu.pdfIn PDF document text
    • http://garmagostaran.com/Upload/file/96627836966.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/fd813f67682b4096c9c790ef6e270563/61003867184.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/2a3702d44198ed0c5e4cd9c1bf463772/zulugila.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/b47927ed2bbb9521f78f11581e45ebb3/jatesawitotonapew.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e022f35c6---99466232087.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/widomila.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/ufmsmg5klhjqspnmr0de7hbbbr/xubuwezoj.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/kuzefesoda.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b75542232f4---luzijutizitesoludotekaku.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/57573397713.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/46759831207.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=khatrimaza+hollywood+war+movies+in+hindi+a+to+z+720p+downloadPDF link annotation

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