Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23652780816ddd5…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 17:29:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f3ea1db76b2273abcb235d1bf586f757 SHA-1: 8bf9e461cc64c67ab2da6a8b14a5da1b7f7eb76e SHA-256: c23652780816ddd55a45f75e8cca5416cd25be6c6fe0c7d8d8677cceab8c6572
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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/free-robux-with-fake-credit-card-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/aplicacion-para-hackear-roblox-i-tener-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-use-cheat-engine-undetected-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robloxhacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/freer-robux-codes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/what-happens-if-you-get-suspected-of-cheating-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-cheats-mobile_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-and-get-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-shirt-roblox-youtube_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-free-bot_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-assassin-coin-hack-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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22400 bytes
SHA-256: 9f65737c1a940d5ea347e2851624f394e96a60f6daff7cb321a6597e076a4524
font_01_sfnt_off0000621c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 19648 bytes
SHA-256: b4365904f81836f6d7f57343d80434219642aa90bdfc264bdf1a1ccb6b5b9826

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