Malicious PDF — malware analysis report

Static analysis result for SHA-256 99d65ae337716860…

MALICIOUS

PDF

34.7 KB Created: 2021-06-30 20:07:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 522c560895add9367137cdcc2b172b3a SHA-1: adbd6badb744e9676c510d6b2df795b49071892e SHA-256: 99d65ae3377168600ce5a693f879ed1b696849965e9cc1671260952e698fe61d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising free Robux and game hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/rxgate-cf-free-robux-code-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting 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/431946152/rxgate-cf-free-robux-code-game-hack In PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-jailbreak-speed-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-game-card-code-generator_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-and-tix-generator-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-free-redeem-cards-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/murder-island-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-with-tampermonkey_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-q-to-script-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/pokemon-brick-bronze-roblox-where-to-find-exp-share-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-mad-games-aimbot-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/all-free-skins-on-roblox-for-2021_GM431946152.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_off00002fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 22652 bytes
SHA-256: 41bf95c6be0f678c354daf8a6231f40dca2c59e7d22c51c48959bc6637834fe4
font_01_sfnt_off000062c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C6 18996 bytes
SHA-256: 79f1dae893594ee622e9f3a9fef3823c9987a2a33b085dd7fa55518cf75f12e5