Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6219f39205cffd8…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 06:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2239b70e926b39a841559e3d7d5b7994 SHA-1: 554776fe858de45e41d452c4bed604cfbb56bb87 SHA-256: f6219f39205cffd81460cbf0750a65879ed5d4c7d98c35cd4d95cafb8fc851ee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, including one that masquerades as a game hack generator. The primary malicious link identified is https://netcdn.online/app/479516143/how-to-play-minecraft-for-free-game-hack. This lure is designed to trick users into clicking through to potentially malicious content or downloading further payloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/how-to-play-minecraft-for-free-game-hack In PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/tiktok-free-movie-website_GM835599320.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://e-library.stienobel-indonesia.ac.id//repository/minecraft-windows-10-hacked-client_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
stream_004_off000054cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CC 24432 bytes
SHA-256: c05984a70509158cdc907004c4bc7f1f4453c25c5d157f55ab1bcb08bd825377
font_01_sfnt_off00008c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C46 18284 bytes
SHA-256: 30e565cae926cf2505d0f64cbbb860d09a66a84df24e80d913481d9233f56de2

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