Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c1ea2d06a1d5e18…

MALICIOUS

PDF

52.2 KB Created: 2021-06-09 03:34:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 361ea545af9ad3de57d188329f86ab22 SHA-1: 6b004d8b6b308e30b28a1c52ac33588654b86173 SHA-256: 9c1ea2d06a1d5e18b2d267a47795d485b6f2023348b7a54c58750e474111f597
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URL, https://netcdn.tw/app/431946152/hoz-to-hack-roblox-qcc-game-hack, likely leads to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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/hoz-to-hack-roblox-qcc-game-hack
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id//repository/coin-master-links-2021_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/best-free-coin-master-spins_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/free-roblox-gift-card_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/minecraft-gun-games-free_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdf
    • http://library.stikessuakainsan.ac.id//repository/free-unlimited-robux_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id//repository/minecraft-xbox-360-free_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/minecraft-hacks-115-2_GM479516143.pdf
    • http://library.stikessuakainsan.ac.id/repository/ways-to-earn-robux_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/pubg-uc-online_GM1330123889.pdf
    • http://library.stikessuakainsan.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/how-i-got-hack-on-roblox_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/roblox-free-hats-exploit_GM431946152.pdf
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8a.bin
fd7ad0e37b1fb3df64877de636efd4d4078aff3358bfd306d6f9fc91db6bb961		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8A 26576 bytes
font_01_sfnt_off00008e1d.bin
43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E1D 3992 bytes
font_02_sfnt_off00009b3e.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3E 5696 bytes
font_03_sfnt_off0000a850.bin
0acc752985e445cb5eefbf80edba8ecccd19f57a4937c81427857e1b13a2b416		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA850 18424 bytes

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