Malicious PDF — malware analysis report

Static analysis result for SHA-256 e055a98fab2e9fc9…

MALICIOUS

PDF

41.5 KB Created: 2021-09-10 22:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89d606600de8f1911221021963a35146 SHA-1: 8aacf46ddae0d402bd2b949fcfa971899c57f299 SHA-256: e055a98fab2e9fc9f1bafb0e010f040ee77c0ca507e623e3206f8dca9c2518d9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier. It employs a common phishing tactic by presenting an image-based lure, typical of documents designed to trick users into clicking external links. The embedded JavaScript and numerous external URLs, including one pointing to 'coretry.ru', suggest an attempt to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6964

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://coretry.ru/uplcv?utm_term=catch+trainer+pokemon+emerald PDF link annotation
    • http://bharatandcompany.in/ckfinder/userfiles/files/gatonosasivezajixiso.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/vepikakasokitom.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/9681729317.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/af9f1318b450141df22f939a90f83209/74918648151.pdfIn PDF document text
    • http://ibb-online.ru/f/file/52033593596.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/salaritagamivoz.pdfIn PDF document text
    • http://nrgmedia.hu/files/file/jenunelibotamebivog.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/69033158525.pdfIn PDF document text
    • https://2winit.com/Files/files/mimagapazatoba.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/89030846758.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/xavubegodolukozof.pdfIn PDF document text
    • https://proxus.nl/file/kejuvilopiwojidamal.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/613b33bbc072b.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/21431291123.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210910_676CEEC28BFDB67D.pdfIn PDF document text
    • http://oldmotorsclub.com/files/file/72219212094.pdfIn PDF document text
    • https://dacola.com/upload/files/11820617964.pdfIn PDF document text
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/sijutofumabame.pdfIn PDF document text
    • http://swhos.com/upload/files/bamulawajifonitonutopoz.pdfIn PDF document text
    • https://unovosti.tv/ckfinder/userfiles/files/53747939412.pdfIn PDF document text
    • http://erictex.com/ufiles/files/lofaposemidekiwojokavorit.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161325b4c15f2f---84174917379.pdfIn PDF document text
    • http://m-styleauto.com/js/upload/files/80915092012.pdfIn PDF document text
    • https://somos.co/dleyes/admin/fotos/file/80935714342.pdfIn PDF document text

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