Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e37c28840545894…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 14:42:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b9668484830bde99c2567db299b69e2f SHA-1: 926e148965dca5fe32e5e55dc33ab919fabad8fc SHA-256: 3e37c288405458941534350c54a5307c0e07f553fd8686ee6e4d8399e2fa3374
160 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with the primary one pointing to a download for 'coin-master-free-spins-apk-2021-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple links to game hacks and cheats suggests a social engineering attempt to trick users into downloading potentially unwanted or malicious software. 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.tw/app/406889139/coin-master-free-spins-apk-2021-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/raindrop-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-on-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-at-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/cheat-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-time-speed-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins_GM406889139.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_off00003253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3253 22480 bytes
SHA-256: a6b6fda4503116542e57de806dae93fd2b93964a0d6d4257a64c60168c58f504
font_01_sfnt_off00006486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6486 18748 bytes
SHA-256: 5e77ef61f71b9edceb1db79b59856649b40968d05cf737e8f2ff8c48d385844d

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