Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0e9ae2681abacf4…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 10:35:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d771f41bcd0af06b27cd3fead533d8c2 SHA-1: f7dd11a18f157713672f4f9d2dcef3622743d7d4 SHA-256: c0e9ae2681abacf4f56a22e4b6f26f931a4c23d81e5f17fb2d918dcd29b1e1f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free Robux, directing users to the malicious URL http://netcdn.tw/app/431946152/free-robux-real-game-hack. This URL likely serves as a redirector to a malicious payload or phishing page. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a 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.tw/app/431946152/free-robux-real-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-for-now-info-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-spamming-hack-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cheats-for-roblox-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-items-that-hack-your-game_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-survivalist-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-shinobi-story-cheat-script_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-terminal-railways-free-trains_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-change-username-on-roblox-for-free_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_off0000309d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309D 22460 bytes
SHA-256: 664f6677992c9fe511c47dbcf9d3b70069d71330734fe75b877e268cc98ff273
font_01_sfnt_off000062a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A2 18788 bytes
SHA-256: 4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08

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