Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb96cc057a76f37…

MALICIOUS

PDF

41.4 KB Created: 2021-05-17 01:29:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e78ed7e2e3f3f0443625490c1ed536f3 SHA-1: 5d3e661e10c225724132f4989d6be0db74060363 SHA-256: 6fb96cc057a76f375e4040248a9bb14f9f8f57e88dfb35a1c0f93740c07ae310
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack lure, specifically mentioning 'Coin Master Free Spins'. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-link-download-ios-game-hack, is embedded and likely serves as the initial point of compromise. While no scripts were explicitly extracted, the ML classifier strongly flagged this PDF as malicious, suggesting it exploits PDF vulnerabilities or uses obfuscated content to achieve its malicious goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-download-ios-game-hack PDF link annotation
    • https://www.gymun.cz/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-items_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-spins-link-2021-ios_GM406889139.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
stream_003_off00004591.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4591 25216 bytes
SHA-256: 2df5c9990c74f14d9b622de50e54140fb1cce3756cbf30d47baa48045b507e03
font_01_sfnt_off00007e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E39 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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