Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba72fd9be16b0c0a…

MALICIOUS

PDF

46.7 KB Created: 2021-06-08 21:14:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d4c463bf040e6e0027fe58a0d93a41f SHA-1: a159873c0f918bacfc29ef4eee092abd20c25e64 SHA-256: ba72fd9be16b0c0aa9c94a8babf7becc754de642d19ebdbc33582f6b5e303cc2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to a malicious redirector URL. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/como-conseguir-robux-gratis-sin-hacks-2021-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-download-today_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/who-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacking-roblox-accounts-real-way-2021-v3rmillion_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_off0000510a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510A 28116 bytes
SHA-256: 6de1d84a29ad62969103a064a3db22fc3f800990587a952489f00d4b2a428246
font_01_sfnt_off0000905f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905F 19420 bytes
SHA-256: b16972dbd7ecc54d6c6c65300f0097c79a20e19ebbfedd3a9ed7bea7102dedc4

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