Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bec1c8f69262cf5…

MALICIOUS

PDF

47.1 KB Created: 2021-06-11 01:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ede9dd2da41f96a60f1a036191dd203 SHA-1: d32d9390c34c98acfdb8b620100e2e21fe8dc3d4 SHA-256: 1bec1c8f69262cf542f3ee9d7924194efe9da2387d961ec650271cee6a0b599f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. The embedded URL points to a suspicious domain that likely hosts a secondary payload. No scripts were extracted, but the presence of the fake CAPTCHA and external URL strongly suggests an attempt to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/youtube-hack-roblox-accounts-game-hack
    • http://lib.mbp.ac.id/repository/free-robux-glitch-2021_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/roblox-survive-and-kill-the-killers-in-area-51-free_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/roblox-free-draw_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/free-robux-glitch_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-free-pet-food-on-coin-master_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/real-free-spins-for-coin-master_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/google-moon-active_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/roblox-exploit-visenya-free_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-using-inspect-2021_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://lib.mbp.ac.id/repository/assassin-hack-script-roblox_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-robux-fast_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/cheat-engine-lua-script-roblox_GM431946152.pdf
    • http://lib.mbp.ac.id/repository/easy-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005284.bin
a6c0c12de3189da42ea3c04ccbbb5db7204cc89e83a01085845f13267702f629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5284 27676 bytes
font_01_sfnt_off000094c8.bin
8e07f13d5aa19a4869e79f2ec769c6e13f647892d3bc8d0c85c1af61da790a42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94C8 18588 bytes

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