Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dcac82753de5b2…

MALICIOUS

PDF

42.5 KB Created: 2021-05-18 03:33:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1fa1a57bb856d05cde4f28e68c0bd460 SHA-1: 6c54b788e24f3b12cf638e652cb4e8c73cad0114 SHA-256: 54dcac82753de5b2f2a5bf504d71b71e4b67c2b2cd2f74bdb96a45499f744794
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 downloading a malicious application. It contains numerous links to external sites, including one that directly advertises a "coin-master-hack-mod-apk-download". The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-mod-apk-download-game-hack
    • http://apkmaykop.ru/images/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdf
    • http://apkmaykop.ru/images/free-robux-generator_GM431946152.pdf
    • http://apkmaykop.ru/images/coin-master-spin-link-today_GM406889139.pdf
    • http://apkmaykop.ru/images/toolbox-mod_GM479516143.pdf
    • http://apkmaykop.ru/images/free-minecraft-codes_GM479516143.pdf
    • http://apkmaykop.ru/images/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • http://apkmaykop.ru/images/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://apkmaykop.ru/images/roblox-robux-hack_GM431946152.pdf
    • http://apkmaykop.ru/images/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdf
    • http://apkmaykop.ru/images/free-account-roblox-2021_GM431946152.pdf
    • http://apkmaykop.ru/images/free-robux-no-scam_GM431946152.pdf
    • http://apkmaykop.ru/images/online-coin-master-free-spin-app_GM406889139.pdf
    • http://apkmaykop.ru/images/how-to-make-robux-on-roblox_GM431946152.pdf
    • http://apkmaykop.ru/images/roblox-free-play_GM431946152.pdf
    • http://apkmaykop.ru/images/free-robux-co_GM431946152.pdf
    • http://apkmaykop.ru/images/coin-master-hack-no-verification-ios_GM406889139.pdf
    • http://apkmaykop.ru/images/how-to-get-free-robux-hack_GM431946152.pdf
    • http://apkmaykop.ru/images/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://apkmaykop.ru/images/2021-free-spins-coin-master_GM406889139.pdf
    • http://apkmaykop.ru/images/impact-minecraft-hack_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a8.bin
efbfb9f462d7ad2d63b62fdf89d03fd52b7f29fecaf7540711dbdabefb1e6012		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A8 25248 bytes
font_01_sfnt_off0000832b.bin
4c2b378107411dd89e89d15d6fc14f40e4cc39fe2ce380ce578c72ff76b0796b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832B 18472 bytes

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