Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b860f49809b441…

MALICIOUS

PDF

47.7 KB Created: 2021-05-12 01:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 87ca1f75caa52039ed1225c789c5bc83 SHA-1: 093a5416d774540476f9442e371a21e371fd16bf SHA-256: 91b860f49809b441f883c0344bc2b234e7639d0d3c2f3064c68ec434dc5c70cb
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA, a common lure to trick users into clicking malicious links. The embedded URI points to a suspicious URL that likely hosts a secondary payload. The ML classifier also flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/free-spin-and-coin-blogspot-com-game-hack
    • http://perpustakaan.ftk.uinib.ac.id/repository/rbx-hut_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/robux-claimer_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/rewards-roblox_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/free-robux-website_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/how-do-you-get-roblox-money_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/roblox-hack-me_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/toolbox-for-minecraft_GM479516143.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/pro-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/fake-robux-codes_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/robux-hack-free-robux_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • http://perpustakaan.ftk.uinib.ac.id//repository/get-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.ftk.uinib.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ce7.bin
d02291038e8db608f0d12e730f3a1ded565ccd41ae572b1f113f735009d6499a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE7 28412 bytes
font_01_sfnt_off00008d89.bin
fc92a80cefddbcc51cb4ecd7284aa73b746cbd66adcf1d96110f0323ec06b51f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D89 2812 bytes
font_02_sfnt_off00009729.bin
8c60560f4ae8b9a96d4078b3ef6dfb307c9e4974d6ab2cc1a47a3a2c49762880		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9729 18668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.