Malicious PDF — malware analysis report

Static analysis result for SHA-256 603f8a6acc7f2f50…

MALICIOUS

PDF

44.4 KB Created: 2021-06-08 10:13:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5dffa3de21e273f5ec5c7d2e31e3b303 SHA-1: 196691948ced44d23080da75c99b18673d7b6cb5 SHA-256: 603f8a6acc7f2f505d4573cf98a0cd66525fb37ef748fdc2fbe3fea36e6a844b
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 malicious links. The primary link points to a URL associated with executing hack scripts, suggesting a social engineering tactic to deliver further malware. Multiple other URLs hosted on similar domains were also extracted, indicating a broader campaign.

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/how-to-execute-hack-scripts-in-roblox-game-hack
    • http://huounaixunghe.com/images/how-to-get-free-dominos-on-roblox_GM431946152.pdf
    • http://huounaixunghe.com/images/free-minecraft-windows-10-account_GM479516143.pdf
    • http://huounaixunghe.com/images/roblox-island-royale-hacks_GM431946152.pdf
    • http://huounaixunghe.com/images/can-u-get-free-robux_GM431946152.pdf
    • http://huounaixunghe.com/images/get-roebucks-com_GM431946152.pdf
    • http://huounaixunghe.com/images/minecraft-hacked-client_GM479516143.pdf
    • http://huounaixunghe.com/images/free-group-roblox_GM431946152.pdf
    • http://huounaixunghe.com/images/apps-for-free-robux_GM431946152.pdf
    • http://huounaixunghe.com/images/how-to-hack-denis-in-roblox_GM431946152.pdf
    • http://huounaixunghe.com/images/coin-master-hack-no-verification_GM406889139.pdf
    • http://huounaixunghe.com/images/worst-client_GM479516143.pdf
    • http://huounaixunghe.com/images/websites-that-give-free-robux_GM431946152.pdf
    • http://huounaixunghe.com/images/free-spins-coin-master_GM406889139.pdf
    • http://huounaixunghe.com/images/free-robux-working_GM431946152.pdf
    • http://huounaixunghe.com/images/minecraft-server-free-trial_GM479516143.pdf
    • http://huounaixunghe.com/images/how-do-u-get-free-robux-2021_GM431946152.pdf
    • http://huounaixunghe.com/images/free-coin-master-hacks-no-verification_GM406889139.pdf
    • http://huounaixunghe.com/images/minecraft-on-computer-free_GM479516143.pdf
    • http://huounaixunghe.com/images/pubg-uc-number_GM1330123889.pdf
    • http://huounaixunghe.com/images/app-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004eeb.bin
7e09e809277ce4f3127186d2001ef646de78f7b6074fde1513d745056a90ade3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EEB 25548 bytes
font_01_sfnt_off0000891a.bin
b2d2f4a9d75d780680a5a084ace6b8cb55a47107c04c719292675fa56de7050e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x891A 18884 bytes

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