Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8082c28695cf9e1…

MALICIOUS

PDF

44.6 KB Created: 2021-05-11 00:06:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 880d7b9d2c0e086a36488ad4f1ed12f2 SHA-1: 6c5dca2bdd2fb1bfa9a17a3278706782de5170dd SHA-256: e8082c28695cf9e128263d0f6a6d14bbafef6bd9b6286e4daea5370e106b8a88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that point to known malicious redirector infrastructure, disguised as game hack generators. The document body, though heavily obfuscated, contains references to these lures and the malicious URL. The presence of multiple redirector links and the ML classification strongly indicate a malicious intent to redirect users to 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 https://netcdn.xyz/app/406889139/coin-master-no-download-app-but-play-for-free-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/games-for-robux_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
stream_003_off00004d54.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D54 26148 bytes
SHA-256: 1b8c109302bb5d888859ff190fd71ee643924c9035d401f36ce5bc149c68e58f
font_01_sfnt_off00008980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8980 19156 bytes
SHA-256: d7b6f490b42dcfb2d6122599357b88a3225a96ba620445c96d399f93ea3e3daf

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