Malicious PDF — malware analysis report

Static analysis result for SHA-256 51964bb73c0c576e…

MALICIOUS

PDF

34.0 KB Created: 2021-06-24 03:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66a9f8cb28708e551426211ff44bd44f SHA-1: c7fd57ec39bdd903646e14b96bfdf37fdee683e5 SHA-256: 51964bb73c0c576ea467e5ecf8edd5654fd3adb922598f278f637bfbb41a99c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game hacks and downloads. The primary link directs to 'http://netcdn.co/app/479516143/minecraft-dungeons-free-download-pc-game-hack', which is associated with known malicious infrastructure. The document's content and embedded links suggest a phishing or scam attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://netcdn.co/app/479516143/minecraft-dungeons-free-download-pc-game-hack In PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/roblox-sign-in-free_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/serveur-discord-hack-roblox-fr_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/com-roblox_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/abd-roblox_GM431946152.pdfIn PDF document text
    • https://www.salcsinstallations.co.uk/admin/ckfinder/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3182 21736 bytes
SHA-256: c53659426a05046f7ffbaff72a9fd96b9cc1a4fee7af5e5425895ad413d65940
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 18872 bytes
SHA-256: 05183faf73e067548e32258fc58809d25a8fef905510eff8eab59b37bb03aee7

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