Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65e281684e65e1e…

MALICIOUS

PDF

74.9 KB Created: 2021-09-12 17:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5e55e40ed4d73cf44d28710a6981dcba SHA-1: 12a4cff7bab37604557a17b1969877b46e6cceef SHA-256: f65e281684e65e1ec307bfa12c53b0a1356b592facf7c6bc4fe81f3426b45079
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, identified by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic, suggesting it is designed to redirect users to potentially malicious content. The ML_NYX_PDF_MALICIOUS and CLAMAV_DETECTION heuristics confirm its malicious nature, classifying it as phishing or a trojan. While no scripts were explicitly extracted, the structure and heuristics point towards a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8309

Heuristics 4

  • 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.
  • 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://medvor.ru/uplcv?utm_term=what+is+a+diagraph PDF link annotation
    • https://toptenstudy.com/upload/files/BodyFile__613AF8FE514E7.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d9814f20bb---kaguzu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/dagalemonijazure.pdfIn PDF document text
    • http://federicozucchettiarchitetto.eu/userfiles/files/rubinefiganan.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/3951661003.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210911_145146.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/wuvuvi.pdfIn PDF document text
    • http://skidubravy.sk/spravca/ckfinder/userfiles/files/kusokefukawivatanisada.pdfIn PDF document text
    • http://yjeverspeed.com/userfiles/file/moluwazenibilikebasemu.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/xinusebebiwisitufod.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/19679094519.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/24679834253.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/5272248805.pdfIn PDF document text
    • http://bloomx.com/sites/all/sites/bloomx.com/files/dukoruserakajadikivogiwu.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/517925746.pdfIn PDF document text
    • http://studiobaldizzone.com/userfiles/files/digiwebovaf.pdfIn PDF document text
    • http://polipack.ru/content/file/34373866361.pdfIn PDF document text
    • http://potlista.com/file/files/risokax.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/89116969906.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/xoreruw.pdfIn PDF document text
    • http://xn--q20b13r9leepaeb.net/upload/file/202109030351346130.pdfIn PDF document text
    • http://fermobkorea.com/userfiles/file/20210901073708.pdfIn PDF document text
    • http://www.stadion-zarya.ru/ckfinder/userfiles/files/8383542119.pdfIn PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090404483273499.pdfIn PDF document text
    • http://www.bluefashion.cz/ckfinder/userfiles/files/40804565864.pdfIn PDF document text
    • https://cafepiolho.com/uploads/assets/46691227799.pdfIn PDF document text