Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd30fc59c402bbd…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 22:24:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 07b69cbd6094bbaf7ca8e7afbd70208c SHA-1: 9530e00e9d6559ece314a0fd68ce937b1b07c91c SHA-256: 3bd30fc59c402bbd5a85a388488d8e7785c37be526ad478cb4866c929ef57b2d
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to trick users into interacting with malicious content. It also embeds an external URI pointing to a URL that promises free Robux, further reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/431946152/free-robux-no-human-verification-and-no-survey-game-hack
    • http://pustaka-smpn3tpi.com/repository/make-your-own-minecraft-server-free_GM479516143.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/roblox-online-free-no-download_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coinmaster-com_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/original-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/free-robux-earn_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/get-robux-today_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/wurst_GM479516143.pdf
    • http://pustaka-smpn3tpi.com//repository/free-spin-link-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/free-premium-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spons-apk-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/free-spins-coin-master-app_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/robux-best_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-haktuts_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5a.bin
b4ad92bf70bbe6bf469a88b1a22abccd99aaa07d6ca58e99780fa2dfd57de67b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5A 28292 bytes
font_01_sfnt_off00008f18.bin
d2b84e9593d62b74a5e72ac2cd252f85880eba3e829d4f4451320fa49886136c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F18 19328 bytes

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