Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d840670b9227898…

MALICIOUS

PDF

47.7 KB Created: 2021-09-28 06:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 842900fc23e75d016eb4a6e7c4716c40 SHA-1: b9cbadf3cdbcf78a59bcda1ad0d3794e30f5154f SHA-256: 0d840670b922789820e8451baad8c10b75881b7a2566d03554c1c448dd917b42
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external links, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm for deceptive purposes. The ML classifier and ClamAV detection further support its malicious nature, likely serving as a lure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6808

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 https://synerhu.ru/uplcv?utm_term=avengers+infinity+war+full+movie+download+hd PDF link annotation
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/58956987592.pdfIn PDF document text
    • http://rancholasmonturaspremios.com/campannas/file/96896955744.pdfIn PDF document text
    • https://uhcp.com/editor_upload/file/1760791111.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/batakipejagiw.pdfIn PDF document text
    • http://3sdent.com/upload/files/7069174526.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b399220495---roxixudivutisejolowegagu.pdfIn PDF document text
    • https://nic-irq.com/userfiles/files/16746634271.pdfIn PDF document text
    • http://belean.pl/userfiles/file/12138934777.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/fipurorebobolexaxi.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/14285388994.pdfIn PDF document text
    • http://neodentpetrosino.it/userfiles/files/nominazasulolusemo.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109160228318937.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/5271476024.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/derowukug.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/87028626197.pdfIn PDF document text
    • http://skmsm.com/userData/board/file/niparu.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/3180466264.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/balejadafolarujuzapiguj.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/49487639229.pdfIn PDF document text
    • https://clinicscrm.com/img/files/22379472111.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/gadelolipomaxixi.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/xixibagukivojosipudune.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/c04782c54873877d1626cece5588f4a8/39798651141.pdfIn PDF document text