Malicious PDF — malware analysis report

Static analysis result for SHA-256 336c41c00c886909…

MALICIOUS

PDF

54.6 KB Created: 2021-07-07 19:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f220e56c5efaa5cb51f3885b324ccbfc SHA-1: 66c67bdfb4551366ef7a43ce2539bd0eaee92c6a SHA-256: 336c41c00c88690901cdd7dcb2a6bb7a23e5ef8a21a3a8e2e4bbca17921035a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it functions as a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5455

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://infrive.ru/uplcv?utm_term=when+to+use+having+and+where+in+sql PDF link annotation
    • http://tubietelbar.hu/uploadfile/bedizofolatasuwusek.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160756fa578d63---63284246071.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/3845520833.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/73bc264bd1532864c0db067883fb925a/bidoxugafesejux.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/61846380176.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825ee427e95---12982932844.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/warugisatolitibemepaxu.pdfIn PDF document text
    • http://grandviewgroupresort.com/upload/files/jesifojotorofe.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be7857b59dd---fotijodevirikomojag.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089a5afc4434---3779489848.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/d73rge1gj62pn6vn67ovv19gab/jejamiludabanufij.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/30006514118.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/71292957050.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0e0dbf556---nokulegetumirodaselewe.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/takiralosubomigepadarum.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/ronutukobufebuxovexef.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/giwukarosazapivuforavij.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/i3b1aq38b1upirlh66nt333fos/40370751901.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160828c77650df---nifuvifitosasoxepi.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba97f769d32---39546254385.pdfIn PDF document text
    • http://wjcopy.com/upload/files/febezoro.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/78620739319.pdfIn PDF document text
    • http://cableesmaltado.com/d/files/butav.pdfIn PDF document text

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