Malicious PDF — malware analysis report

Static analysis result for SHA-256 1912131e21cb92d4…

MALICIOUS

PDF

45.0 KB Created: 2021-05-19 22:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 2d675b5fa8c2f03b4923c68db570935a SHA-1: 10f501d2a6aff58b3f26a565150a1740455e115d SHA-256: 1912131e21cb92d4e1aa3185231272cc6d2c4809a10de3b098f22c718aad1e51
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/master-free-spin-and-coin-link-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/gamehunters-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-free-spins-link-2021-march_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-hacks-for-coin-master_GM406889139.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_003_off00004ad3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD3 25120 bytes
SHA-256: 198dd702d1bd00424a548407aacde36ca21f49e8145aec0571d2e3c24ea911c5
font_01_sfnt_off000083fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83FE 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA0 18228 bytes
SHA-256: 4b57acba41aa68bb280b2f656de6400654b723400b96e238fbc94aea55036d0e