Malicious PDF — malware analysis report

Static analysis result for SHA-256 09644f5abeffa6d1…

MALICIOUS

PDF

32.4 KB Created: 2021-07-05 18:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 763834e1fa0ba8f9c1c2b291b06d4866 SHA-1: 5e4ee7abe57625a84b08b4989d9c7a86fdd4d27c SHA-256: 09644f5abeffa6d14cf82ce075b00e8e5961a4a1f3b555d3518f5f5310936b96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document contains multiple links and embedded text that lure the user into clicking a link for a "free generator / game hack". The primary link, http://netcdn.tw/app/406889139/coin-master-daily-bonus-game-hack, is identified as a malicious redirector. The document's structure and content suggest it is designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-daily-bonus-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-do-you-get-free-robux-on-a-samsung_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/hack-robux-not-patched-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/superhero-body-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-copy-game-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/www-roblox-com-free-items_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/tiktok-free-nose-job_GM835599320.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-on-roblox-app_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-sky-slayer-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-free-no-download_GM479516143.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_off00002a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1E 22192 bytes
SHA-256: 704d0f02b1374b3c90e6950b8a613ffa817a26527980a9cdfa40a429db962569
font_01_sfnt_off00005b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B41 18612 bytes
SHA-256: 72017a97322e8485497f8fdeabbecd4477664dfde293126b902d1c1106f91e80

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