Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb23b566ad1ebbf…

MALICIOUS

PDF

49.1 KB Created: 2021-06-11 07:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9195ef63477a6e79b8e8706e1ce77485 SHA-1: 7b369a3dfad34ff6f426d83562644afb178d1318 SHA-256: ebb23b566ad1ebbf4d2d64e7816cefb94b85c7510e92b5a5045b882715498ea3
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a malicious link. The primary link points to a site offering free Robux, which is a common social engineering tactic. Multiple other PDF URLs were extracted, suggesting a broader campaign or related lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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-robux-roblox-hack-no-survey-no-human-verification-2021-game-hack
    • http://lib.kunci.or.id/repository/www-coin-master-hack-xyz_GM406889139.pdf
    • http://lib.kunci.or.id/repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-coins_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-robux-groups-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/minecraft-life-hacks_GM479516143.pdf
    • http://lib.kunci.or.id/repository/master-coin-free-spin-daily_GM406889139.pdf
    • http://lib.kunci.or.id/repository/elemental-battlegrounds-roblox-hack_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-spin-whatsapp-group_GM406889139.pdf
    • http://lib.kunci.or.id/repository/wurst-hacked-client_GM479516143.pdf
    • http://lib.kunci.or.id/repository/coin-master-hack-spin-generator_GM406889139.pdf
    • http://lib.kunci.or.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://lib.kunci.or.id/repository/roblox-free-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-spins-coin-master-app-iphone_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-coins-coin-master-blog_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-robux-giveaway-live_GM431946152.pdf
    • http://lib.kunci.or.id/repository/robux-free-roblox-glitch-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/minecraft-pc-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000512d.bin
792006a56119f81277eab57720c3474d53107ef740168d122ad9e9c079223d02		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x512D 25568 bytes
font_01_sfnt_off00008bdd.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDD 3884 bytes
font_02_sfnt_off00009885.bin
1ad3c219830fb1b1bd59773f8243c9966f8830fadd1fa80d4a0cb757d9878295		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9885 19868 bytes

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