Malicious PDF — malware analysis report

Static analysis result for SHA-256 5af0c02ac39bf54a…

MALICIOUS

PDF

41.4 KB Created: 2021-05-14 05:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e8432f15973c9d697f9060913b98d797 SHA-1: 7b64429ceaf6c9db7f648592c7ddba2ea98118b2 SHA-256: 5af0c02ac39bf54a5f699c64e02190cb42602751f84c21c1eb2144f6f413480b
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URL, https://netcdn.xyz/app/431946152/roblox-earn-robux-game-hack, likely leads to the download of a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/roblox-earn-robux-game-hack
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-100-spin-slot_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/real-minecraft-for-free_GM479516143.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-robux_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-today_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/minecraft-complete-handbook_GM479516143.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-group-payouts_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/daily-free-spin-and-coin_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-many-levels-in-coin-master_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-back-accessories-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004952.bin
9a9664f1a3041dda591d68ffbf44f5bb38b2202b42256234b653b971753c93de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4952 23840 bytes
font_01_sfnt_off00007f97.bin
ac560818c0950b36a4d7f23f452e83199291727370614d0236bf7521a0e82fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F97 18152 bytes

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