Malicious PDF — malware analysis report

Static analysis result for SHA-256 e477bb3729e6e3fb…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 22:14:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6714dc194427452a94925abde832866f SHA-1: e4b781698ee9739056344c7b7c52a835668eb71d SHA-256: e477bb3729e6e3fbf7ed07f09739baeac74b4a8256cd9a28ea8339851b9bbd32
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action to obtain 'free Robux', which is a common lure for scams or malware downloads. The document embeds multiple URLs, including one pointing to a potential payload or further scam page. The ML classifier also strongly indicated maliciousness.

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-no-human-verification-or-survey-or-download-2021-game-hack
    • https://www.man2samarinda.com/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-play-minecraft-with-friends-for-free_GM479516143.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/robux-download_GM431946152.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/coin-master-free-spins-through-coin-pop_GM406889139.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free_GM479516143.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/coin-master-hacks-to-get-spins_GM406889139.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/clean-master-hack-coins_GM406889139.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/roblox-hack-ga_GM431946152.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/free-t-shirt-roblox_GM431946152.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/hackear-coin-master-android_GM406889139.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/free-robux-codes-2021_GM431946152.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • https://man2samarinda.com/__statics/gudangsoal/files/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • https://www.man2samarinda.com/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b5c.bin
34e04b52aaa6effd9b4eea0d751f8f32908dbfe563074f0064dc685bc7edf18c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5C 23896 bytes
font_01_sfnt_off0000819c.bin
66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x819C 20136 bytes

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