Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198c3ba68a61712…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 19:16:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44c661c33d96108e7094a1cb08cf2200 SHA-1: 7ace5105bae4c91e451e598fd7b6ed6b483597c5 SHA-256: 3198c3ba68a61712a823ee8d7fedc5bb63bde826b85b964a8bb152648672ab93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded URLs, such as http://netcdn.tw/app/406889139/coinmasterfreespins-game-hack, are designed to lead users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

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/coinmasterfreespins-game-hack In PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/nuevo-robux-hack-2021-funcionando-robux-gratis_GM431946152.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-robux-no-hacking-2021_GM431946152.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-and-spin_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/robux-hack-tool-2021-download_GM431946152.pdfIn PDF document text
    • http://e-learningmin7jakarta.com/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_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
stream_002_off0000308a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308A 22700 bytes
SHA-256: 245f044d6e49cc01ad11e074bca08ee02c659e6bb4e2bb03c339b3ac76b30658
font_01_sfnt_off00006326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6326 18272 bytes
SHA-256: 07d1048110b648044dfdf05b80b578e3dafb2e438d2dd29495699789e7328ffb

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