Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e6a512ffa139e2…

MALICIOUS

PDF

47.2 KB Created: 2021-05-15 02:34:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3ef7ccc273e45ff9b975f112646238b0 SHA-1: 7f4c07c6e0ac9738b36c9e75224251d1d6a34546 SHA-256: 25e6a512ffa139e249b96c77a48a710a54402294a2d78aeb620a47b010f41e49
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 users into downloading applications, likely related to game hacks or cheats. It contains numerous embedded URLs pointing to various download sites, including one directly associated with a 'coin master hack'. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/download-coin-master-hack-apk-game-hack
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/minecraft-client-download_GM479516143.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/minecraft-free-download-linux_GM479516143.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-hair-for-free_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/best-way-to-get-free-robux_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-do-i-earn-robux_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-hack-without-downloading-apps_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/monttechscom-coin-master-free-spins_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-app_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/coinmaster-spin-ml-free_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-roblox-card_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/minecraft-app-store-free_GM479516143.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/games-that-can-be-hacked_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/hack-coin-master-app_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/500-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d5e.bin
fc05db2d4565acfc15cb46cca91f7b75d094ccc630ff878f447fcfe386d23f50
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D5E 29092 bytes
font_01_sfnt_off0000897f.bin
1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
pdf-font-stream PDF embedded font (sfnt) at offset 0x897F 3380 bytes
font_02_sfnt_off00009568.bin
b18cc985ac6e8dfcc93ac62d071ee2f888ffbfea1324d1d3cb097b8431324b0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x9568 18472 bytes