Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3bf851f4b24d57a…

MALICIOUS

PDF

18.8 KB Created: 2021-06-10 23:24:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2434541d511eca3fb82d46fb2bc559a0 SHA-1: bd7b98a8b74af5d4d8b6312a3c32c6ad2369396e SHA-256: b3bf851f4b24d57abdf07f5a9598af54dfae11c589c8544e53fe9856b6e651c7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links that redirect to known malicious infrastructure, specifically promoting 'free game hacks' and generators. The primary link, https://netcdn.tw/app/431946152/codes-to-get-free-robux-2021-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 3

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://netcdn.tw/app/431946152/codes-to-get-free-robux-2021-game-hack In PDF document text
    • http://bw.ac.th/userfiles/files/static-moonactive_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/caught-my-mom-cheating-in-roblox_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/how-do-you-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://bw.ac.th/userfiles/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text