Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da4d2da90d6bbb3…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 23:51:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 09265ec5df6506e10750d2a3ef241e6e SHA-1: 7bb7583daa59b815f708096b0f7ef512ad5dd51d SHA-256: 5da4d2da90d6bbb312d273c681d4b1c95138dc114c38ac1b8bb8e69a87807330
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a high-confidence heuristic indicating it links to a game hack generator, which is a common lure for malicious sites. The embedded URL 'http://netcdn.tw/app/406889139/coin-master-tiradas-gratis-game-hack' is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the nature of PDF exploits often involves embedded JavaScript for malicious actions.

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/406889139/coin-master-tiradas-gratis-game-hack PDF link annotation
    • http://library.atim.ac.id/repository/roblox-for-free-no-signing-up-geust_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-install-hack-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/dinosaur-simulator-roblox-dna-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-account-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/free-beyblade-roblox_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robux-hack-computer-no-app-download-computer_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-cheat-engine-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-the-lords-of-nomrial-hack_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-admin-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/roblox-how-to-make-t-shirts-free_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/how-to-get-22-000-free-robux_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://library.atim.ac.id/repository/hack-roblox-dragon-ball-rage-android_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_off000030c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C9 22640 bytes
SHA-256: 888a0f553c26700e87eb8340c089c0318acd3d1a7d1b4645b020057f914a83c2
font_01_sfnt_off0000637e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637E 18008 bytes
SHA-256: 26943db6994c8f596f05ac3b4f3dc1d413dbcf08a64b9909b9531db9603e905b

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