Malicious PDF — malware analysis report

Static analysis result for SHA-256 da610e6450d697b0…

MALICIOUS

PDF

50.3 KB Created: 2021-06-04 02:54:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 88aa00b293a7cc33048f7ffdbcc75bb3 SHA-1: ae4ed794157474595ac731dc91ae9ff1e91252d8 SHA-256: da610e6450d697b0b1934397751cfec229bbbfc11431b3fc0276400a206eaa01
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA lure, aiming to trick users into interacting with malicious links. The embedded URL and numerous other extracted URLs point to sites offering 'free Robux' or 'Coin Master' cheats, which are common pretexts for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

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.online/app/431946152/how-to-get-free-robux-for-kids-game-hack
    • http://perpus.stfm.ac.id/repository/roblox-free-hats_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/roblox-kohls-admin-house-hack-script_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/hack-the-game-coin-master_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-hack-pc_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/free-robux-human-verification_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/free-robux-discord_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdf
    • http://www.perpus.stfm.ac.id/repository/simplysarc_GM479516143.pdf
    • http://www.perpus.stfm.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/robux-generator-without-verification_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/is-it-possible-to-hack-coin-master_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://perpus.stfm.ac.id/repository/earn-free-spins-in-coin-master_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • http://perpus.stfm.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://www.perpus.stfm.ac.id/repository/free-robux-on-phone_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535a.bin
2c8893f887e880b52947c691703a776866a089dcb10fd0b1519d21ee3d5992e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535A 28980 bytes
font_01_sfnt_off00009420.bin
f2b95ff9d8471bee3533511d646108afdc4fc4cee2674765639c22a660a4534d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9420 3680 bytes
font_02_sfnt_off0000a116.bin
d8259766cf036cd113d0b26237eaaf1c704bfb1290fa2ba3336ef80e6ae93167		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA116 18576 bytes

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