Malicious PDF — malware analysis report

Static analysis result for SHA-256 24a72d21bb6f0c9d…

MALICIOUS

PDF

33.7 KB Created: 2021-06-19 10:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 84b7df0e2efad9f7bebbf5c4bd40b650 SHA-1: 42e1465da51f34f8936daf7f03fa59e0fe359c57 SHA-256: 24a72d21bb6f0c9d8524bf6dcf502037453b6fd556655b1a460497e67483dcd8
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high-confidence heuristic firing for a game hack redirect lure. The document body and extracted URLs promote 'free Robux' or game hacks, indicating a social engineering lure to trick users into clicking malicious links. The embedded JavaScript likely facilitates the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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-money-i-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-d_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-spins-generated-from-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-private-server-free-download_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE4 21976 bytes
SHA-256: a584cdb741861629f991218f8b0b4fe3a9b64b74dc3ef4beda5e36d44587d659
font_01_sfnt_off00005e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E6F 19092 bytes
SHA-256: 77e094971679a89338bfd3bb323cb4872dc7fa70a39755fa802e86a6cc003ab5

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