Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5b7fec31ee081b…

MALICIOUS

PDF

70.1 KB Created: 2021-09-22 09:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: ba1689bd9f330e9b1a3beed2efbd2baf SHA-1: 7ad9df0274eb015ec30f40f9c4e2567187ce6129 SHA-256: 3e5b7fec31ee081bda51cf02403be281c843ecdf6452fb8da7699f40f17a4672
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm designed to obscure malicious destinations. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9156

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
  • 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://townofwinslowin.com/flash/townofwinslowin.com/file/52563490352.pdf In PDF document text
    • http://hyundaidongdo3s.com/images/files/nuxisamipewekofim.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/37919955107.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/24705086792.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/nuvelevofa.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/33063182638.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/88188928268.pdfIn PDF document text
    • http://canadanur.com/resimler/files/82373676035.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/56831799411.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/42282975139.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/44123007509.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/veradibodiwufufonapi.pdfIn PDF document text
    • http://perechen-jurnalov.ru/js/ckfinder/userfiles/files/91906995480.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161403374192a6---36935807162.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/27853797730.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/wajafok.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/44198196747.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134142dbbda2---15295484488.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/64342040034.pdfIn PDF document text
    • http://groupelamiri.com/uploads/FCK_files/file/22226228782.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/80590459340.pdfIn PDF document text
    • https://euinsuti.uniluxgym.ro/app/webroot/files/userfiles/files/kuwunawezutase.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/73959885361.pdfIn PDF document text
    • https://bankkartya.hu/js/ckfinder/userfiles/files/dopov.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/vudozapixubusasadogejokez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sarileru+neekevvaru+full+movie+in+tamil+download+in+isaiminiPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 10932 bytes
SHA-256: 51a6e4895d3ec1d9ea2e607b98d59133f313c815707b43860c9c2c2c280969b8

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