Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a4ed9743acc8c2…

MALICIOUS

PDF

62.3 KB Created: 2021-09-15 17:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0d57e6ed0314e8031adaff35ac9bf882 SHA-1: 48bf7e0e6143b61088d8d2c6340dbea4b87dc754 SHA-256: 15a4ed9743acc8c247ef8763726d0577ef7e402177c98802505cffa86890ca17
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The sample also exhibits characteristics of a link farm, with numerous URLs pointing to disposable hosting, suggesting an attempt to obscure the final destination or distribute payloads. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5897

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sevvalturizm.com/rsm/files/11373718989.pdf In PDF document text
    • https://skywaytravelandholidays.com/ckfinder/userfiles/files/kugoxawudemura.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/66393625602.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141b53af1f34---56008339037.pdfIn PDF document text
    • https://msiutilities.net/documents/54024323953.pdfIn PDF document text
    • https://saigonservices.vn/images/uploads/files/37513901144.pdfIn PDF document text
    • https://jin-hung.com/userfiles/file/vupipexoga.pdfIn PDF document text
    • http://ctnphrae.com/ckfinder/userfiles/files/dijewadazaw.pdfIn PDF document text
    • https://vienhung.com/webroot/img/files/4883780515.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/girepuribomeleravame.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-13/20210913092149702053.pdfIn PDF document text
    • http://nsmpublicschool.org/slbdavbatala/userfiles/file/44592555544.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/4efv77258jsqb37h6f4qb2bm0k/kerodaxuleve.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/rafisuzukewaxilu.pdfIn PDF document text
    • http://herningbadintra.dk/app/webroot/upload/files/84691064536.pdfIn PDF document text
    • http://myxroad.net/upload/userfiles/file///vasuwegaxomufidiz.pdfIn PDF document text
    • https://franciscojaviermoreno.com/DocsCKeditor/files/16365737680.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/velewoxakelare.pdfIn PDF document text
    • http://primaneighbors.com/userimages/zijarawa.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/8677017176.pdfIn PDF document text
    • http://cke.hk/userfiles/dijubufuxigumulokuzeroben.pdfIn PDF document text
    • http://ramenhajimetustin.com/uploads/files/12122866110.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/jumujilapidexaxutat.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=calisthenics+workout+program+pdfPDF link annotation

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