Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f44bb7ecd91f1f7…

MALICIOUS

PDF

46.1 KB Created: 2021-05-13 14:20:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66c1298f3af47014dc95aa146f534e9b SHA-1: 168a6cb2eb10de94d23c516ed7a7f73ef232a52b SHA-256: 4f44bb7ecd91f1f7a7a7a51bc09c5d63ea5aae0a935e0eaeb3ad8315714473fd
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 generators'. The primary lure URL is https://netcdn.xyz/app/406889139/free-unlimited-coin-master-online-tool-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially harmful content, likely as a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-unlimited-coin-master-online-tool-game-hack In PDF document text
    • http://riccardodurso.it/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://riccardodurso.it/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://riccardodurso.it/images/xray-hack_GM479516143.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
font_00_sfnt_off00004c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C48 26104 bytes
SHA-256: 04621ca2fd3ad4f18c477a7f569cd9941653eb4035a1afc2ed6ef893b639075c
font_01_sfnt_off00008804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8804 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000091a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A7 18404 bytes
SHA-256: 16a74109dc566aa70c42b08450d12fdf99fe854d8a9e984f145c1fae59d3e7dd

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