Malicious PDF — malware analysis report

Static analysis result for SHA-256 191164e5fe9ad943…

MALICIOUS

PDF

32.4 KB Created: 2021-07-20 02:20:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: af9744eb00be5da14f95ef5b86c02124 SHA-1: bb2a1d145d30f4dce2b49e00e8aeb6fd660ca17d SHA-256: 191164e5fe9ad943677392b2d376b56957bfa166c810eaf875359e49340fa788
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/431946152/free-roblox-accounts-with-robux-game-hack In PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://www.tucsen.net/Public/upload/editorfiles/free-tiktok-accounts_GM835599320.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_off00002bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC6 21588 bytes
SHA-256: d462c4d57557bfe33f2fd4a13cd93ab04461c1bb973b018243a12e314a2a271b
font_01_sfnt_off00005b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 18860 bytes
SHA-256: 865574bf4c8bdee12f9e426a22e4a3f20a88a2333a4bf7711c0a9b9eff7733be

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