Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ddd90cb1ed55bc…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 14:58:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 035aefdfca1edc778da9cc6b143c3d32 SHA-1: deaaaac3a4194ea60c25e134398786d651bfb535 SHA-256: 50ddd90cb1ed55bc2fce1e66497219883e7b9c04e7b8ffadfea16f8bcfba3a1f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a prominent link disguised as a game hack generator, which is a common social engineering tactic to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded URI and the nature of the lure suggest an attempt to redirect the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-free-spins-daily-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-roblox-outfits-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FED 25736 bytes
SHA-256: 1e7ef80ab27dfcb175322c72995705163ef497d1b50f0b00d98dc81fc47ccd70
font_01_sfnt_off00008a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 2824 bytes
SHA-256: a0d6c1ef1f7405ab05245801e4abbc2877925f97898db53811df9ab010e978fa
font_02_sfnt_off0000940b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x940B 18308 bytes
SHA-256: 220bb6194b1ab8a2bb399ca4a862914ac8d15b354bb0df2c737bc67699221dc9

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