Malicious PDF — malware analysis report

Static analysis result for SHA-256 557a708b39bc2ce4…

MALICIOUS

PDF

22.9 KB Created: 2021-05-13 04:46:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9106158b0e02994a59001278d940d9d1 SHA-1: cbbca6a2bb3830d02d9f52642f0bdbfe67e3c0d9 SHA-256: 557a708b39bc2ce4ee24a8008a54ec0422fa58cd4535e848d668153b9739a889
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, that are disguised as "free generators" or "game hacks." The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or scamming attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.xyz/app/406889139/coin-master-daily-bonus-hack-game-hack In PDF document text
    • http://bestmaids.co.uk/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-hair-roblox_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/300-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://bestmaids.co.uk/images/coin-master-free-coins_GM406889139.pdfIn PDF document text