Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c98bc344eb5efbc…

MALICIOUS

PDF

43.6 KB Created: 2021-06-03 09:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 02a413c55c82125967e09037df28303d SHA-1: 106d5706207d7bd74dccd685feb969c5d954684e SHA-256: 3c98bc344eb5efbcac623ef49226d17ed0ad2d817515ea1ba678c83e59037dc0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document presents a fake CAPTCHA or human verification prompt to trick users into clicking a link. This link, 'https://netcdn.online/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack', likely leads to the download of a second-stage payload. The presence of multiple URLs related to game hacks and free items suggests a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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.online/app/406889139/hack-to-get-free-spins-on-coin-master-game-hack PDF link annotation
    • https://hotelyetihome.com/userfiles/files/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-generator-no-human-verification-2021_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
stream_004_off00004f83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F83 25220 bytes
SHA-256: be85dcb06335fab7a5ac43565ad06bbb15a6797a16e1ff4c065aa07e99a3c649
font_01_sfnt_off00008887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8887 18056 bytes
SHA-256: 2fbb404e8dbae95b2969f6d33f181e6a84e8673995acec3e52dde22e48280f02

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