Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5a57fd901b67157…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 12:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 042c691b80ba6f246a7703bdadfdc69f SHA-1: a9c6b8d5405168c37b9ee9609cc325b9d0c897a5 SHA-256: c5a57fd901b67157ee51f6c16a14f10d1ad32d18e4ac23c3a4b183981c7e1656
82 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites offering game hacks and free spins, presented with a fake CAPTCHA lure to trick users into clicking. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs suggest a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and content point towards a social engineering attack.

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-heaven-free-spins-today-game-hack
    • http://j-cook.pro/images/minecraft-pe-hack-client-ios_GM479516143.pdf
    • http://j-cook.pro/images/roblox-hack-2021_GM431946152.pdf
    • http://j-cook.pro/images/hack-para-coin-master-singapore_GM406889139.pdf
    • http://j-cook.pro/images/do-robux-generators-work_GM431946152.pdf
    • http://j-cook.pro/images/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdf
    • http://j-cook.pro/images/free-robux-mod_GM431946152.pdf
    • http://j-cook.pro/images/coin-master-unlimited-spins_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://j-cook.pro/images/como-descargar-coin-master-hackeado_GM406889139.pdf
    • http://j-cook.pro/images/daily-spins-coin-master_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • http://j-cook.pro/images/minecraft-bedrock-edition-hacks_GM479516143.pdf
    • http://j-cook.pro/images/free-robux-com-2021_GM431946152.pdf
    • http://j-cook.pro/images/easy-robux-generator_GM431946152.pdf
    • http://j-cook.pro/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://j-cook.pro/images/game-hunters-coin-master_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-hacks-no-verification_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-apk-mod-hack-download_GM406889139.pdf
    • http://j-cook.pro/images/coin-master-free-pin_GM406889139.pdf
    • http://j-cook.pro/images/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047f9.bin
f818c89832daf74dcf2167b9a5506635111b2110607d26b86479f5d414d59d00		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47F9 25228 bytes
font_01_sfnt_off000080cd.bin
60a5a430713f1161b8494f77535ec8b7c572fc0a829325370a59d32a1885166f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80CD 18356 bytes

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