Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2e550999e3e31d…

MALICIOUS

PDF

41.1 KB Created: 2021-05-14 20:05:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: cceca88c88034f0069f8c6bd1393767a SHA-1: e99beb6c12f26a03cc708a2394b6872c926a3057 SHA-256: 4f2e550999e3e31d2513fe18faff2f3d5d1e87cbc6b7873d3670d870617e751d
122 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a download button lure to entice users to click on a link for game hacks. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-coins-game-hack, which likely serves as a redirector to a malicious payload. The document's structure and embedded links suggest an attempt to exploit user interest in game cheats to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-coins-game-hack PDF link annotation
    • http://tegeler-segler.de/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://tegeler-segler.de/images/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-hack-ios-without-verification_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://tegeler-segler.de/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-spin-app-coin-master_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_off0000497c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497C 24348 bytes
SHA-256: 11f259dd72927452db40935630559aacdcbc3a51c0001d356adddbd892073132
font_01_sfnt_off000080ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80ED 17380 bytes
SHA-256: 4587a0da3d318d3aab2e4d3a2e17e88175961c64bd2fb3ac3dbf4933656e475a

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