Malicious PDF — malware analysis report

Static analysis result for SHA-256 4093389da11f40c9…

MALICIOUS

PDF

63.7 KB Created: 2021-09-23 07:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3954bc6374503f27cf6edcde49093128 SHA-1: 0b7afcbc62f26f47dd2e648823197da0d571fe16 SHA-256: 4093389da11f40c9fd61cb7435029d95ea88f9f10565559b3b5e601144ec2fee
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected by ClamAV as Pdf.Phishing.Trojan and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The presence of embedded JavaScript suggests an attempt to execute malicious code or redirect the user, likely to a phishing page or a download site. The PDF's structure and the high ML classifier score further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6403

Heuristics 6

  • 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.
  • 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 https://nomylo.ru/uplcv?utm_term=jumanji+next+level+gomovies PDF link annotation
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b9abb24094---raredumapetidanawozugoz.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/vigasixujanetiwesonevigo.pdfIn PDF document text
    • http://ladna.pl/user_images/file/nidamixinenonix.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/25303946267.pdfIn PDF document text
    • http://modero.vn/upload/files/61807326956.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ccae11a96---79937321427.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/52319752917.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb704bdde9---88016226260.pdfIn PDF document text
    • https://vilus.cz/userfiles/file/gojokifabixum.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210906015240.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210920084644.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/fevafo.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/74720877118.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/23123927474.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/21354579412.pdfIn PDF document text
    • http://progetec.org/userfiles/files/nekex.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/32660087802.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/125f6c8bc35eb233f45ef598ec564853/pirenazetupubujedena.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/mezatovepafeno.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/kezanivuvinena.pdfIn PDF document text
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51089957610.pdfIn PDF document text
    • http://vp-dmsh.ru/admin/ckfinder/userfiles/files/melilodidatigobemilobizo.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/57686739990.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/muzitit.pdfIn PDF document text
    • http://delfosventures.eu/userfiles/files/72055325729.pdfIn PDF document text

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