Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c425ff726086d9c…

MALICIOUS

PDF

24.3 KB Created: 2021-06-11 04:35:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b17c811c17c2f81e534809a90a23529 SHA-1: 174f38e8ae3d874bc023d994f851e509fe1e61ee SHA-256: 3c425ff726086d9c04b95f14366a7059be24dd9b0868b00d081c12ce6d0b8218
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to redirect users to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is https://netcdn.tw/app/431946152/free-robux-giftcard-wix-game-hack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or scam attempt, likely leveraging social engineering to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/free-robux-giftcard-wix-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-hack-on-jailbreak-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-cheat-net_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-hack-and-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-net_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text

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