Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef4fb5a1a45b01f…

MALICIOUS

PDF

33.2 KB Created: 2021-06-18 07:57:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 695b5b17fe0d1806009a3c0e5c4d8c83 SHA-1: 52cf0043e94ff04d024f8400be0cdf10c622ef39 SHA-256: eef4fb5a1a45b01fab8f043830e1633dca2afbb34970c668ad49be311b48de9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it uses a download button lure. The primary URL http://netcdn.co/app/431946152/robux-hack-dll-game-hack is associated with a known malicious redirector.

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/robux-hack-dll-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-roblox-dollars_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-bundles-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-tycoon-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-stream_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
font_00_sfnt_off00002ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE4 21812 bytes
SHA-256: 00e4b37c3f90634380c44b90e041f95cc1f26456ebd6310bb5a6997c51947727
font_01_sfnt_off00005cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD3 18964 bytes
SHA-256: e2250886acc76f893792553ec6a2f87f3fbba9318e4367b5c68c15c8be82737f

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