Malicious PDF — malware analysis report

Static analysis result for SHA-256 20409b9cc1014c32…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 11:17:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 47b604780d4320c339e715c94d6150ee SHA-1: f05cc1f2ca59a8a54a51e096d1cb4a7cc98c2cc6 SHA-256: 20409b9cc1014c32b923c1e2722becbf89445e45517a6d67634264d4054af153
82 Risk Score

Malware Insights

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

The sample is a PDF that displays a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It also contains an embedded URI pointing to a URL that appears to be related to game hacks, further supporting the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/how-to-get-free-roebucks-on-roblox-game-hack
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/real-free-robux-generator_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-tiktok-app_GM835599320.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/bit-ly-coin-master-hack_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/robux-xyz_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/make-free-robux_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/collect-free-spins-for-coin-master_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-attack-hack_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-limiteds-roblox_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/roblox-free-games-guest_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/hack-the-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000523b.bin
b4edec4023be1462d7b3499567de58507f5046354d91c449b616e1baba973baa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x523B 25640 bytes
font_01_sfnt_off00008a25.bin
b7643ab87c6ede69648f322cd81a197be2475f7126f117e622ee98ccb7431d7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A25 18524 bytes

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