Malicious PDF — malware analysis report

Static analysis result for SHA-256 953b57864ee11235…

MALICIOUS

PDF

47.1 KB Created: 2021-06-09 15:28:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f5503e20241e0960bdf1ba878311d93 SHA-1: c88848872c1d309fe72094ff666e4eb0b97756dd SHA-256: 953b57864ee11235f49a24a96680da99dabc4faf478747bec8ede58d1f1646c7
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into clicking a link, which is a common social engineering tactic. The embedded URL leads to a resource that likely serves as a download for a second-stage payload. No scripts were extracted, limiting further analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/free-gtv-in-roblox-game-hack
    • http://library.stiks-tarakanita.ac.id/repository/collect-free-spins-for-coin-master_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-change-roblox-game-name-with-hacks_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-windows-10-free_GM479516143.pdf
    • http://library.stiks-tarakanita.ac.id/repository/get-more-free-spins-on-coin-master_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-microsoft_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/roblox-redeem-robux_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-injector_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-codes-november-2021_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/hacking-roblox-stat-games_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/alien-backpack-roblox-free_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdf
    • http://library.stiks-tarakanita.ac.id/repository/roblox-help-free-robux_GM431946152.pdf
    • http://library.stiks-tarakanita.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdf
    • https://www.nrzroblox.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050df.bin
f7901791b9f3de0962218a034aae8bc140ab932aec5ad8a9d200b44d8fedcd0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DF 24492 bytes
font_01_sfnt_off0000889a.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x889A 5696 bytes
font_02_sfnt_off000095ab.bin
60af8306faa9cf350b3a3be80b42ca41d7126faf20060ffb7a6ad211a40b4d28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95AB 18164 bytes

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