Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a6479d59d268f9…

MALICIOUS

PDF

63.7 KB Created: 2021-08-28 02:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 616667110e202d5c64e25f78744362a2 SHA-1: 1ffd39c5a180c163527f0025097abd4c7dc861b4 SHA-256: 15a6479d59d268f9ff45b092eec8211a9a10b2fe4de3a382e88d2e448d46936b
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

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 http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e0c8c208d---75614096688.pdf In PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/p3l7a2stb5ns44tb97drh5ucsb/16983855086.pdfIn PDF document text
    • http://patp1ryb.ru/media/file/30080182577.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/98745592539.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/tovivobej.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/8bfae6212f7b8a14484c0e783972808a/35789150069.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/e7e574437bfb2d414c188222994e40f8/ruropitemojusunixor.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611aa6d4b6ee9---funezubojuxekabeboramiz.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/ki83st705fboq3avse4e9lkd6t/fuzokit.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/756e5f3e663dfee90dcb2b37936ae65a/zatidopavexatinewube.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e603e44a98c---99828493373.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/43500491852.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/dab316f4abb98da2dfa2b9a08f94711f/nebabomavaxenofigo.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/90f26c1e96474bafdf9db1c4b95f60a7/54658854396.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d23d766cd0---87977898339.pdfIn PDF document text
    • https://limsurempat.com/contents//files/wezefuzinexekupifisiw.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16224667150602.pdfIn PDF document text
    • http://reclamesticker.nl/images/uploads/file/lunakorawel.pdfIn PDF document text
    • http://mjsolankifoundation.com/fck/imagesfile/64941949180.pdfIn PDF document text
    • http://siamsankyo.com/Uploads/file/viwopaxaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=this+is+my+only+begotten+sonPDF link annotation

Open this report in the interactive analyzer, or submit your own file for analysis.