Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3e9c3bb19abdd7…

MALICIOUS

PDF

41.3 KB Created: 2021-05-14 15:32:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0f3d83125db53b545b2dc1b6efda607d SHA-1: a00659c21b76e319af44ca7c34090846fa05df4c SHA-256: ca3e9c3bb19abdd7966a2184499d3ba058ec6842848c31583b5b7865b3356f12
82 Risk Score

Malware Insights

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

The document presents itself as a lure for 'free Robux' and contains a fake CAPTCHA or human verification prompt, indicating a social engineering tactic to trick users. It embeds multiple URLs, one of which is directly linked to a potential download or scam page. 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/431946152/how-to-get-free-robux-com-game-hack
    • http://jdlogistic.cz/images/latest-free-spin-coin-master-daily_GM406889139.pdf
    • http://jdlogistic.cz/images/fake-robux-codes_GM431946152.pdf
    • http://jdlogistic.cz/images/free-gold-cards-coin-master_GM406889139.pdf
    • http://jdlogistic.cz/images/spin-free-coin-master_GM406889139.pdf
    • http://jdlogistic.cz/images/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://jdlogistic.cz/images/claim-robux_GM431946152.pdf
    • http://jdlogistic.cz/images/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://jdlogistic.cz/images/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • http://jdlogistic.cz/images/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://jdlogistic.cz/images/coin-master-100-free-spins-link_GM406889139.pdf
    • http://jdlogistic.cz/images/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://jdlogistic.cz/images/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://jdlogistic.cz/images/minecraft-pc-free_GM479516143.pdf
    • http://jdlogistic.cz/images/cone-master_GM406889139.pdf
    • http://jdlogistic.cz/images/free-coin-master-spins-blogger_GM406889139.pdf
    • http://jdlogistic.cz/images/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://jdlogistic.cz/images/roblox-script-hacks_GM431946152.pdf
    • http://jdlogistic.cz/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://jdlogistic.cz/images/roblox-hack-tool_GM431946152.pdf
    • http://jdlogistic.cz/images/real-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000459a.bin
ffbe4cf0e8e6054839764b4c3f479aeaad899dd9b81aaded3f038bc1c49a2a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x459A 24680 bytes
font_01_sfnt_off00007e39.bin
592d037155b891bbb2f70d3f14a8a619d2fef64eb32d8f0fc2e46f6e8e925839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E39 18544 bytes

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