Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc8dc57fba20a2fd…

MALICIOUS

PDF

44.3 KB Created: 2021-06-09 08:16:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7dce81a230f82821c054917066920a8e SHA-1: 849f5c7c9a97784be6f9c97472bfd7e4c3d8ed02 SHA-256: cc8dc57fba20a2fd64fa99b1e4036e9b132efba28b142e0d300ed4c0556a13b9
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA or human verification prompt to trick users into clicking a link. The embedded URL, https://netcdn.tw/app/431946152/roblox-hacking-kqko-game-hack, likely leads to a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/roblox-hacking-kqko-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/adopt-me-roblox-hacks_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-windows-10-code-free_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/robux-hacks-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/robux-hack-generator-no-veriy_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/get-free-robux-info_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-scam_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/can-you-give-me-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-robux-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-online-game_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/rbl-gg-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-clothes-on-roblox-on-your-phone_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/pokemon-go-free-verizon-code_GM1094591345.pdf
    • http://opac.akafarma-aceh.ac.id/repository/robuxy-com-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-exploits_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-reddit_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f54.bin
51fba716b6fa858ebb641545362a319670eebf70af51f52d3d48aad6077fee88		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F54 25060 bytes
font_01_sfnt_off000088d6.bin
ccabab5e904a35ed4178819ea92f75d9d044e766269daf116ca7cf2313e50f92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D6 18760 bytes

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