Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198a8d494a24a39…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 10:40:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 72e1db48820491b6c40f83a173d761b2 SHA-1: ba551c50b2e454ed2d312a4c1d1ac5144c8df58a SHA-256: 3198a8d494a24a39e10b3c6c825c71e724ab66bbdcb8bbf3e574ad80be1971f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to websites advertising 'free generators' and 'game hacks', a common lure for phishing or scamming users. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure itself facilitates these malicious redirects, likely aiming to deliver a second-stage payload or collect user information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/freerubux-game-hack In PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/tiktok-free-hulu-account_GM835599320.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/tiktok-free-generator_GM835599320.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/how-2-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://e-lib.smaxaverius5.sch.id/repository/free-robux-exe_GM431946152.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
stream_004_off00005006.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5006 26788 bytes
SHA-256: 24358a188b7e8d0c0050ec8fe9b61d376d4c7629e355267099cca6d2eb337b24
font_01_sfnt_off00008c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6F 17872 bytes
SHA-256: f4416bbc5f287efcbe31c7b4c704cc92a0ced0ddcdd2f5cfb5fb7d41fdf7fc1a

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