Malicious PDF — malware analysis report

Static analysis result for SHA-256 af20134e9dfd15dc…

MALICIOUS

PDF

36.1 KB Created: 2021-06-18 09:42:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-21
MD5: 8e0a876ab7619b30e81488162f07a830 SHA-1: 6cfbd2a75cce4e0719020002d2dc080f0ce760f2 SHA-256: af20134e9dfd15dc4954f29aef9d0e0d9b69a7822bdbb46bd03e9e2c1c0f9f2d
160 Risk Score

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/how-to-get-free-robux-100-working-2021-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/picture-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-toys-codes-free-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-remy-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-it-isint-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-download-android-apk_GM479516143.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_off00003368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3368 22564 bytes
SHA-256: 2bac818e655e86e66ba3c54d9d9d06d82380ac08116c6a888d0e54d62d1fa392
font_01_sfnt_off000065a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A0 19876 bytes
SHA-256: 5a3d9cc0faff1371665ccb9e087f8046ebb36e46da274c19bc8ee76bb691ebc5