Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5059e18467ede1…

MALICIOUS

PDF

62.3 KB Created: 2021-07-14 06:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 72b8ede229591b0102ce5ab6506038e6 SHA-1: 5ed0f8e7ca70e7e9ae86c5ae684ab002fa956502 SHA-256: 5b5059e18467ede151acdc8f47d836f9d4502a2fefcae9581f2acd9d2ff87052
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it's likely a phishing or malware distribution lure. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, designed to redirect users to malicious content. The document body was unreadable, but the heuristics strongly suggest a malicious intent to leverage these links for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6065

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f76e0ca66---1763622298.pdf In PDF document text
    • https://haisanquangninh.org/data/dulieu/files/faluzudepemevozepuxor.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/078556527e704969427ee2c1c1f0aff6/wisagekakedegixakos.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/25745863059.pdfIn PDF document text
    • http://ruihuitax.com/files/file/60499891072.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/xenuvenalobiv.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9a3749cfe4adb67d4540391aa87f4f4c/paxana.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/42502840310.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/54412124067.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/12c2a79cf9715cc433998a12a6d30c0e/javugotagatarunilubunuro.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/87792588296.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95b273ffa---86363703593.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3c07500fa---malusulafejapopusalusax.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b724d3fb---bekiwezelate.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/ci7tq7pon5dqi10dfgmr30abfl/63330254929.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/bbe38af2e8976ce886bb8d3af9032e1a/zujivuj.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/nexamowenetaguwugukapaso.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076163034a00---60899802269.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8b489bd8b---kamajosagiwa.pdfIn PDF document text
    • http://pressvaluation.net/userfiles/file/bukafekaxumawijakumi.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/0kuf6ps1s3n83t598k7g3tec42/8556335416.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/42861893150.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=well+intentioned+meaningPDF link annotation

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