Malicious PDF — malware analysis report

Static analysis result for SHA-256 873bc5078f497691…

MALICIOUS

PDF

45.8 KB Created: 2021-06-08 14:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7b3187500749b568feca4b2a97aec9a4 SHA-1: 985ffcadccabb3e5c7715605f90079b08a6d97b7 SHA-256: 873bc5078f497691576d506c273c38fea5d3e2b3a7036d7a87c3bff04377f7b3
82 Risk Score

Malware Insights

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

The document exhibits characteristics of a lure, specifically a fake CAPTCHA, designed to trick users into interacting with embedded malicious links. The primary link identified, https://netcdn.tw/app/431946152/roblox-are-they-giving-away-free-robux-game-hack, is likely intended to lead to a secondary payload download or further phishing attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-are-they-giving-away-free-robux-game-hack
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-get-free-followers-on-tiktok-without-verification_GM835599320.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/best-free-hacked-client_GM479516143.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/roblox-help-free-robux_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-roblox-clothes_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-800-robux_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-with-bruteforce_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/coin-master-golden-card-hack_GM406889139.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/microsoft-bing-robux_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/get-free-robux-gg_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/no-human-verification_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/40-free-spins-coin-master_GM406889139.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdf
    • http://www.amtqatar.com/uploaded_files/userfiles/files/roblox-place-rewards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005115.bin
4b36b1e6eea1c51151a7485e706817351cd120ddee52070e9898bb27dc5ef1ef		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5115 26088 bytes
font_01_sfnt_off00008d76.bin
d33124944d211d349a97b09142bddc12d5c27312fa9c513321ff0e5a10230863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D76 19348 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.