Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5aedd0090afa12…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 08:31:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e28981825d975f6deb6f6a31837ee44a SHA-1: cbb4bb1befb701a3ee407b4a68454c8b867c9939 SHA-256: 1b5aedd0090afa127b011a4ce5b0126240dd884716eeac1d59f38146cfd77656
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free Robux'. The primary lure URL is http://netcdn.co/app/431946152/best-way-to-get-free-and-easy-robux-fast-game-hack. This pattern suggests a phishing or scam campaign designed to trick users into visiting potentially harmful sites. No scripts were extracted from this sample.

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/best-way-to-get-free-and-easy-robux-fast-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/howe-to-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-roblox-2021-descargar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/real-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-no-hack-or-download-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/tiktok-fame-free_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3122 22120 bytes
SHA-256: 65c13bd9b8e56b38854b98c204a807998f55e74c426323136a75205fcd4e675b
font_01_sfnt_off0000624b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624B 19372 bytes
SHA-256: 6669512a47a1075f748e085ac437c713424158729d614f86da7ddde4c2e411c6

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