Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf62dfcbf63533e…

MALICIOUS

PDF

57.4 KB Created: 2021-09-13 11:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ba2079c681750dae9d50dfa0a2b5c2d8 SHA-1: 879a6b79f91aa7e2eca80fb21e68d3881e810212 SHA-256: 8bf62dfcbf63533e46198f6e69bc7032b0dac63fbb5742034d5acd90cecece94
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristic firings indicate that this JavaScript is likely used to redirect the user to a link farm, as evidenced by the numerous external URIs pointing to various domains. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mis.nrru.ac.th/gradjournal/ckfinder/userfiles/files/vurapavizobodipedivowida.pdf In PDF document text
    • https://nissanzorba.ro/ckeditor/ckfinder/userfiles/files/97453508943.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/2031377180.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/vozuwasitopu.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd588def3e---68259904526.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/25206327390.pdfIn PDF document text
    • http://eqletstalk.com/uploads/files/202109110814126769.pdfIn PDF document text
    • https://jackinthegym.com/uploads/files/202109090728189007.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/4401776641.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/wisazinorax.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/zofaxigolegenadofijivog.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/40600992007.pdfIn PDF document text
    • http://rem-proekt.com/f/file/wakilasakomutufurusonazan.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/mazofesolosipabokatijizod.pdfIn PDF document text
    • https://smilaxlabs.com/userfiles/files/44351299553.pdfIn PDF document text
    • https://ksi-system.pl/editorfiles/file/47567722258.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/4661232314.pdfIn PDF document text
    • http://anm-av.de/uploads/files/tutizuwodupasutuvibek.pdfIn PDF document text
    • http://piannocreativo.com/js/new/fckeditor/userfiles/file/36691251122.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/44640249760.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/xewenugikesixadujarij.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/161389cb2ca130---62197168512.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/roperozuvuti.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/32738137516.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-5/20210905014440932986.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gujarati+asmita+book+pdfPDF link annotation

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