Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb423cfaf3cd398…

MALICIOUS

PDF

35.6 KB Created: 2021-07-06 05:57:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f451b92aee38292a89e36153842076d0 SHA-1: e769920b36aaa05f17ff9eb4ecc7d782d561f1ae SHA-256: aeb423cfaf3cd3985ec4f4fb6e9f9b63b90db25ee6d10e2b8e71645fa28d9b11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/free-roblox-groups-with-funds-game-hack. The document body and heuristics indicate a lure for game hacks or generators, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the embedded URLs and redirector heuristic strongly indicate malicious intent.

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-roblox-groups-with-funds-game-hack In PDF document text
    • http://library.polita.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/roblox-jailbreak-cheat-engine-money-hack_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-followers-no-survey-roblox_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.polita.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.polita.ac.id/repository/how-to-make-a-free-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-lvl7-full-lua-roblox_GM431946152.pdfIn PDF document text
    • http://library.polita.ac.id/repository/free-robux-websites-2021_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
font_00_sfnt_off00003165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3165 22680 bytes
SHA-256: 0b227934467958a3699580cc806d5d7c11c6c86f5aee4f97f66869412f531567
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 19728 bytes
SHA-256: 2cdd203eabba8abe9d03b117152df076ab5a5850af7c776b19f8c5001c53e9fc

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