Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15e2a46a8b77222…

MALICIOUS

PDF

42.7 KB Created: 2021-05-14 14:13:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 44e6449a17ccfa17b39f531921eeeb83 SHA-1: a1c855ac5daa6d2f6da8d7c0aa7b0b1712b39425 SHA-256: d15e2a46a8b772227cb38410fd8a1650338c915984ce7b4ffcc8e152cecc104c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA to trick users into interacting with the content, likely leading them to download a second-stage payload from the embedded URL. The document body and extracted URLs suggest a lure related to free game items (Robux, Coin Master spins), which is a common social engineering tactic. No scripts were extracted, limiting the analysis of the execution flow.

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/apps-for-free-robux-game-hack
    • http://www.ma-plast.hr/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://www.ma-plast.hr/files/roblox-robux-page_GM431946152.pdf
    • http://www.ma-plast.hr/files/coin-master-heaven-free-spins_GM406889139.pdf
    • https://www.ma-plast.hr/files/free-minecraft-servers-to-join_GM479516143.pdf
    • https://www.ma-plast.hr/files/script-executor-roblox-free_GM431946152.pdf
    • http://www.ma-plast.hr/files/free-robux-no-scam_GM431946152.pdf
    • http://www.ma-plast.hr/files/coin-master-spin-rewards_GM406889139.pdf
    • http://www.ma-plast.hr/files/coin-master-free-in-app-purchases_GM406889139.pdf
    • https://www.ma-plast.hr/files/minecraft-client_GM479516143.pdf
    • https://www.ma-plast.hr/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdf
    • http://www.ma-plast.hr/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://www.ma-plast.hr/files/free-spins-coin-master-app_GM406889139.pdf
    • http://www.ma-plast.hr/files/minecraft-free-demo_GM479516143.pdf
    • http://www.ma-plast.hr/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdf
    • http://www.ma-plast.hr/files/minecraft-dungeons-free-download_GM479516143.pdf
    • http://www.ma-plast.hr/files/funbloxxyz-free-robux_GM431946152.pdf
    • http://www.ma-plast.hr/files/www-coin-master-hack_GM406889139.pdf
    • https://www.ma-plast.hr/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • https://www.ma-plast.hr/files/coin-master-free-spins-facebook_GM406889139.pdf
    • https://www.ma-plast.hr/files/minecraft-com-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a16.bin
2263877c953dd9657a973dcc0fcaef7d327073ba777b8fad72c91dbdf287ed46		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A16 25276 bytes
font_01_sfnt_off000084ec.bin
b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EC 18192 bytes

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