Malicious PDF — malware analysis report

Static analysis result for SHA-256 31610e03beb4073a…

MALICIOUS

PDF

44.5 KB Created: 2021-06-10 22:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3858a25fe19dc8d487bd8fbde7d11a37 SHA-1: 6192100fbd839381955d0183f464ffa906338222 SHA-256: 31610e03beb4073a63a307b2ef7ff0699ea3dafbafd2a8ea34fa5ce2a3d52917
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure, aiming to trick users into downloading a file, likely related to game exploits. It embeds external URLs that lead to potentially malicious content, suggesting a phishing or social engineering attack. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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-level-7-roblox-exploit-game-hack
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-phantom-forces-hack-dll_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/roblox-hack-app_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-magical-chest-coin-master_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-hack-apk_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/kachifpro_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-hack-tool-exe_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-hack-version-33-2_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-free-spins-a2z-help_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-for-kids_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/robux-hack-download-games_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-coin-master-cheats_GM406889139.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/free-roblox-codes-2021_GM431946152.pdf
    • http://katalog.iain-padangsidimpuan.ac.id/repository/juego-hackeado-de-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fad.bin
77ea7787c4c9d39bdf2c514498a9116dc9b00c0abc8379609cfbf78ffd011c36		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAD 25364 bytes
font_01_sfnt_off00008ab6.bin
a0b113a65cb496ec258bea3ed7b215cfbf4b5f456aef3511a1c2996a725896ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 18520 bytes

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