Malicious PDF — malware analysis report

Static analysis result for SHA-256 b317628077abd96c…

MALICIOUS

PDF

70.4 KB Created: 2021-07-22 07:41:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d93aa9c41b82a29334e3f2e3b6a4f90a SHA-1: 19aebd46fb2303d194bde630e7dfe111ca490708 SHA-256: b317628077abd96c6e65cff623e5f709bb5cb120a0c6a3162fd45b941c970f2d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

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://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160acd7eb8eb65---rapadiwisijo.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/v7orll6bknjhtuvpuq1pg2ng7h/zifupirixinan.pdfIn PDF document text
    • http://bukhatirhomes.com/userfiles/file/66797926316.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc287b58a3---bisewegunopemazojif.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/94914769692.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/nddfg2vfm5mk8b95qir39qj8o0/takuge.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/71639f27ae43993825727ccb5f5c38f4/wewokudodibuto.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/851de403c5172da08f880479f45a0b94/bakupiremedirura.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160dba2a466da5---54395308970.pdfIn PDF document text
    • https://mszukam.pl/dat//file/78979718571.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ec7766b77---janetovojafusudotajoda.pdfIn PDF document text
    • http://flexa.cz/docs/file/15958404224.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/srdr3nodo4bcl3ij1a24ed4nte/goxiz.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/xemazopo.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/d6a79c3eb5b115124046def0581c0989/57587143905.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/tufaw.pdfIn PDF document text
    • https://kimtuong.vn/isc/public/files/fckupload/file/24220139882.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/908c03e909f9fc57d1eefab60401beab/napomufoposanovisame.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851bc9cf18b---tenokuvenovuzosobonireze.pdfIn PDF document text
    • http://luluscafeonline.com/uploads/files/18645967452.pdfIn PDF document text
    • http://18554080.com/userfiles/file/kavezi.pdfIn PDF document text
    • http://j-line.ca/fck_upload/file/guzumokowuwubuferip.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7369b259b9---25506292965.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607871220358a---pasonifun.pdfIn PDF document text
    • http://climtech.com/files/files/75854800845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=cnet+qled+reviewPDF link annotation

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