Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d3b14dec55313d…

MALICIOUS

PDF

43.3 KB Created: 2021-06-03 09:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8c26fcc2505176454af32238043cb6d6 SHA-1: eecb0f7a687aedec93e78c1039823cbd5288723c SHA-256: f3d3b14dec55313d872bfd8737c86b1ff1a6bc25fcdbd28c2e4d9acc4eba5437
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains embedded JavaScript and links to external URLs that are designed to lure users into downloading potentially malicious content, likely related to game hacks and free in-game currency. The heuristic firings indicate the presence of JavaScript and a high-risk redirector lure, suggesting an attempt to exploit users through social engineering. The embedded JavaScript likely facilitates the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-headless-head-roblox-game-hack PDF link annotation
    • https://sundae.co.th/js/userfiles/files/pubg-uc-wallpaper_GM1330123889.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/hack-roblox-atravesar-paredes-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://sundae.co.th/js/userfiles/files/mcpe-download_GM479516143.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_off00004ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ED9 24472 bytes
SHA-256: c337f7aed7095b33f331f42860a7ca8c089c2d9c47f2f0a49c1e400644a7f135
font_01_sfnt_off00008673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8673 18348 bytes
SHA-256: 63d99b8cbf455ab0d965626ac401ea421cc47a85f69736e4fa719bce4e2c55ac

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