Malicious PDF — malware analysis report

Static analysis result for SHA-256 dadab5d30c782894…

MALICIOUS

PDF

63.7 KB Created: 2021-07-17 15:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5083b45dca16ced4929567c427d80ac2 SHA-1: f97c95ce2cc4f3f9a9e8ec748001ce2e7571b5a2 SHA-256: dadab5d30c7828945f21ce82e8cd40a8fda45ea77cc73a4894fd734b2701a455
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the nature of the document as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

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://www.contectrade.hu/fckfiles/file/69239638980.pdf In PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aa3bce4a2---54256159678.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/dthh9946ujq9es8p8lhgo6l05s/vipazut.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/r8chc4kgh63hmo73fcsuai1dar/33988925498.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/piveputugevigedupejolu.pdfIn PDF document text
    • http://dansensvenner.dk/imagesfile///mejavanuxifizanekenubuwox.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/gibisewenapekaranuzupow.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/sabatudajasigazu.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/2dnkvloomng08vqka7sgue588f/letubejoposawuxojawutuja.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16072e58208782---55373207956.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b41670a33---55912375064.pdfIn PDF document text
    • https://loctra.net/userfiles/file/22000773416.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cde072be9b---51881285967.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/nijanokaz.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcba9822c8---nixerisitetamakoj.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1aaba2076---97923885438.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/66329530043.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160822d48cfd14---65776041794.pdfIn PDF document text
    • http://gps-tw.com/CKEdit/upload/files/zexafexobigawozeg.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/libejajun.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/63929153081.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078ea58c5ca3---63240862914.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/2vve68qfc970oh1pjcrj6irv9a/69525438254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=limbic+system+physiologyPDF link annotation

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