Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f6101eca24f284…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 12:30:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 616c72ddf3ad53d9868d2ec1a233de0d SHA-1: 004e75eae585a69fc5058ed1576ab393a049857b SHA-256: 50f6101eca24f284c826e67e4da235e5141a425b1f0635c6641101fd65ea2e54
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/how-to-earn-robux-for-free-2021-game-hack. The presence of a visual download button further supports the malicious intent of directing users to potentially harmful content or malware downloads.

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.tw/app/431946152/how-to-earn-robux-for-free-2021-game-hack In PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-hack-other-peoples-inventory-in-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-remy-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/hack-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/how-do-you-get-free-robux-on-laptop_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/2021-no-servey-robux-hack_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-roblox-script-corrector-discord_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-roblox-accounts-v3rm_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/free-money-hack-on-roblox-car-simulator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/roblox-quick-easy-cheat_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/roblox-rpg-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpj.com/opac/repository/snapse-hack-roblox-2021-anti-ban_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/equillex-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpj.com/opac/repository/how-to-hack-coin-master_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_off000030ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BA 22944 bytes
SHA-256: 4d9ff3828258ec87f0a7a105086287ab67b24bd4ee3d76ca33513401cb359b04
font_01_sfnt_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 19284 bytes
SHA-256: b399ae733d7917559aeb38653f56690fc8d0842846df9d5376906f0eed96920f

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