Malicious PDF — malware analysis report

Static analysis result for SHA-256 784178fece4d36fe…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 22:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3a60b0a36c77def3d256251e5481e5f0 SHA-1: 794a23778db8c2db510bd2214f181a282b0aab72 SHA-256: 784178fece4d36feef25641fa6c230b7984c88f2ba94b671a8b8d3f152108874
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious infrastructure, specifically advertising 'free Robux' and 'game hacks'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a social engineering tactic to drive traffic to potentially harmful websites.

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/431946152/free-robux-without-verification-game-hack In PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-script-to-hack-into-an-accont_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-roblox-accounts-with-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-hack-someones-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-400-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/robux-hack-apk-download_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/toolbox-apk_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-admin-hack-adopt-and-raise-a-cute-kid_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/spin-coin-master-free_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_off000030e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E0 22712 bytes
SHA-256: 20bf857685c3b32ff540adfca77c716bd4251dccf11bdc9f7dd5572f4f98d597
font_01_sfnt_off0000636a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636A 19436 bytes
SHA-256: 45b9ce1014872b369476cc75d8a7b63b2e3ed395e28419daf66bd30eabd4401a

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