Malicious PDF — malware analysis report

Static analysis result for SHA-256 af919e435c264942…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 03:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 51e87ebeadd64c6059ebadb27e33f38b SHA-1: d394fa68265bd638a1699d040de17263d8caea1d SHA-256: af919e435c264942e37cf597897cf110b1b96cf80bfa7b79fdd09c2fd930de01
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 to trick the user into clicking a malicious link. The primary link, https://netcdn.xyz/app/431946152/free-robux-promo-codes-2021-game-hack, is embedded within the document and likely leads to a further malicious download or exploit. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-promo-codes-2021-game-hack
    • http://rlsaluminios.com.pt/images/hack-robux_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/free-robux-no-verification-or-survey-2021_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/blogspot-coin-master-spins_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/hack-xp-net-coin-master_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/roblox-hack-tool_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/roblox-army-free-robux_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/free-spins-on-coin-master-link_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/coin-master-hack-cheat-generator-d_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/coin-master-official-website_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/coin-master-spins_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/roblox-robux-hack_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/roblox-generator_GM431946152.pdf
    • http://rlsaluminios.com.pt/images/minecraft-for-free-games_GM479516143.pdf
    • http://rlsaluminios.com.pt/images/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://rlsaluminios.com.pt/images/woman-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_off00004752.bin
b1ae3801ecef6db5f4e1a0668f9385bc9025210df72e843c8d7252b1d431d0fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4752 27948 bytes
font_01_sfnt_off000085de.bin
2ae4233163b81a205a597c97f5f9bceef85a21038461a0399da8d1b6d9f39b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DE 19004 bytes

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