Malicious PDF — malware analysis report

Static analysis result for SHA-256 7822d4506bc9ceff…

MALICIOUS

PDF

53.2 KB Created: 2021-06-08 16:57:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: dc8635e2802cf0e73d9d4f90b8644dc9 SHA-1: 3874d6c17ff46909a6c5b80617e88be0dc910142 SHA-256: 7822d4506bc9ceff5dff739fb29808a6c4f4984554dfa9071327186fd3181e46
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9616

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/phantom-forces-hack-roblox-2021x2021-game-hack In PDF document text
    • http://lib3tell.stptrisakti.net//repository/hack-download_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/daily-spin_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000528d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528D 26632 bytes
SHA-256: 205858c511cb6d9323408e1946a96cb5817a544af391e2b8081fad98c78fbe63
font_01_sfnt_off00008f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F80 8376 bytes
SHA-256: 092b7a11ef2af93d0b61b37032e6f669359ea7bc5bcb682d43a712f599a5ca39
font_02_sfnt_off0000aa4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA4F 19432 bytes
SHA-256: 94f353c2ef50985cc730566689ffd0ab8674f67bf287e1aec6bb93ae3b7a6ca5