Malicious PDF — malware analysis report

Static analysis result for SHA-256 f323ac926c1f950e…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 12:39:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 105b8e2260b3ae4d5b6e63254fa095e1 SHA-1: 7a071e84ddef656cc604aee046018d113498a406 SHA-256: f323ac926c1f950ea79a6d11084e85c2cf48d71f61da88eef2295eb9d1a744f6
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', strongly suggesting a social engineering lure. It also embeds a URL pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/431946152/free-roblox-accounts-dantdm-game-hack
    • http://elektrofahrspass.de/images/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • http://elektrofahrspass.de/images/minecraft-free-games-no-download_GM479516143.pdf
    • http://elektrofahrspass.de/images/coin-master-on-facebook_GM406889139.pdf
    • http://elektrofahrspass.de/images/rbx-hut_GM431946152.pdf
    • http://elektrofahrspass.de/images/free-robux-gift-card-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000328e.bin
ffdf2ebcb8ef4b44f1fdcaa5fe4eda2c6336a0a6a7ebdfe0199f9b6cd8276507		 pdf-font-stream PDF embedded font (sfnt) at offset 0x328E 24740 bytes
font_01_sfnt_off00006a92.bin
fab1cdea1c90721c250ad49de139f00c3e6c4251d6a59756d793536ca2bf5ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A92 19020 bytes

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