Malicious PDF — malware analysis report

Static analysis result for SHA-256 0517d3fdc0a941e0…

MALICIOUS

PDF

49.8 KB Created: 2021-07-16 01:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f17b33a4c0bdacdb8fa05cac3b711398 SHA-1: a0098f69bef42b5241b1c479b3777614c7f6a173 SHA-256: 0517d3fdc0a941e0512c35ea3fdcec27343a0354cc8fc4c481195396ac99fde4
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. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages, indicating a phishing or credential harvesting campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7126

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 https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c81c3579c---63280005383.pdf In PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b580f36c8c6---41307701.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/18909018452.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/7216909517.pdfIn PDF document text
    • https://mollis.rs//files/15241781089.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/f817630570c259b98f63ddd07908f267/nezuvutaxinujusabeg.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/3212368956.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/sugimakiwudigetu.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/15eeun5bfnbu2j3955gkc7f4jn/56733709106.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a2846b4e3---nipiwazumokojadifotaditu.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/papuxuwevexibag.pdfIn PDF document text
    • https://best-label.com/upload/files/dapogikatam.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/sazuvokofanawupe.pdfIn PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/760f6e5eb51c30e601fc7563c0f18cf3/kikaxukevupopigisagofoza.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/41f575curh82dmc95n42d7nq15/nenolariropemazenovetel.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/titosopaxawajemi.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/147637236.pdfIn PDF document text
    • http://feast.to/upd_file/79817764672.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/d13d1245ca2d5782bc79ad65aefcdc85/tajonavar.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/0d146324569208abfdabd33e653d1865/2665013818.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160841ceac4947---25182839236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pdf+scanner+androidPDF link annotation

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