Malicious PDF — malware analysis report

Static analysis result for SHA-256 9328a81ad855a219…

MALICIOUS

PDF

62.0 KB Created: 2021-09-09 17:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d7e67ef3f83b31a758ef2d27be8376f3 SHA-1: 8757735c1db4251c181d75891db29b998e58b817 SHA-256: 9328a81ad855a219f75b60a459ea2293e8b099390cd485f62ba4f22d5385ea28
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6913

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 http://eiffelflowersquesnel.com/userfiles/file/49762029106.pdf In PDF document text
    • https://foulardfotografando.it/file/rifurujebutegexofew.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/ruzitukememuj.pdfIn PDF document text
    • https://asiastudy.in/ckfinder/userfiles/files/zajujufejotuxarixatowexuz.pdfIn PDF document text
    • https://aayams.com/userfiles/file/14399816257.pdfIn PDF document text
    • http://midoriku.zaitakunet.jp/app/webroot/upload_images/files/pijalojewasuxazugaxatedur.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/sibikep.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/faf5d119e91514f97003dab705013f73/83833932064.pdfIn PDF document text
    • http://chenruichem.com/upload/files/punadurokirumilofuj.pdfIn PDF document text
    • https://coevent.ru/upload/files/67531034055.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/dukofulumoxid.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161355f67d285d---62410978016.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/mozeraluwavatifusa.pdfIn PDF document text
    • http://www.velkoobchod-man.eu/ckfinder/userfiles/files/godebolamuwuwavesimejun.pdfIn PDF document text
    • http://parkergeneralcontractors.net/userfiles/file/sexerusukegonurikutiv.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/tarinilezafaguwoparibalu.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/161363ba4bd8b1---71731605740.pdfIn PDF document text
    • http://tiszaladany.hu/upload/file/13432095155.pdfIn PDF document text
    • http://inbiosa.eu/static/cfiles/files/52133995097.pdfIn PDF document text
    • http://telecycling.org/files/file/bisanarerul.pdfIn PDF document text
    • http://leeclinic.kr/userData/board/file/gaxifuwini.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/duruf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=psn+card+number+freePDF link annotation

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