Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2aaf31c6db7cdf…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 06:25:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b5805c07de09fa6e4a12c7594cb28285 SHA-1: 4c73439fb85c077d117a1019125c71afd54e5358 SHA-256: 4f2aaf31c6db7cdf2fc9a106b839188a66efe8241934fd48e6dc56168750bb44
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file employs a common lure of offering game hacks and cheats to trick users into clicking malicious links. The document body and heuristics indicate a redirection to external sites, such as http://netcdn.co/app/431946152/speed-hack-in-roblox-jailbreak-game-hack, which likely host further malicious content or downloads. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/speed-hack-in-roblox-jailbreak-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/roblox-boku-no-roblox-remastered-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-spins-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/thing-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/auto-clicker-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-studio-download-for-pc-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-coin-master-credit_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-on-robux-store_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-gold-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/games-that-give-you-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-code-for-huge-cat-pet-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-vip-server-boku-no-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-lua-scripts-admin-hacks_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/prison-break-16-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-discord-ggroups_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-mobile-app-free-download_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_002_off00002fa0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FA0 21820 bytes
SHA-256: 06e8c0dd660773ef16867f758ac13aead07a7018dded8a0e7a12fdc2d91252ad
font_01_sfnt_off00005f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 19292 bytes
SHA-256: a400ae62a8838eddbe1955512190562bab559df3460cb073468d726f7aed41be

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