Malicious PDF — malware analysis report

Static analysis result for SHA-256 e517bdc24fd89b3a…

MALICIOUS

PDF

48.6 KB Created: 2021-06-10 20:50:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfa3d1c5c6c4a14bcf2a4281cd4e7cc3 SHA-1: f76a1f8e48157e4f83254171535745389353211e SHA-256: e517bdc24fd89b3a2808efd15c5646b13eeadc0a281ea1ee17438abc41da0d0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded URLs and a heuristic firing for an external URI, all pointing to sites offering game cheats and hacks. The presence of a visual download button lure further suggests an attempt to trick the user into downloading a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/roblox-free-no-account-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-gift-card-includes-free-virtual-item_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/easy-roblox-today_GM431946152.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_off000051d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D9 26332 bytes
SHA-256: fc9d5d71846c8ec670d131dafc733327b04778751eaecde75527e0f9968a88e7
font_01_sfnt_off00008e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B95 18192 bytes
SHA-256: e968676f64d589de7b4ce1523e88eaf52a6711e7f3beb9d858c9d1aeee5bbce1

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