Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80d43a093d36884…

MALICIOUS

PDF

43.6 KB Created: 2021-05-20 02:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 824f2cf6e94495232647de7ce4a9d9b3 SHA-1: a2b04001c4fcf664481d9c332d330d5f3a41392f SHA-256: a80d43a093d368848f0cb657305c1bb15a2e040fda9cbde5d7749e84d7448310
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents itself as a lure for 'free Robux' and displays a fake CAPTCHA, a common tactic to trick users into executing malicious content. The embedded URL points to a suspicious domain, and the ML classifier strongly flagged this PDF as malicious. The document likely serves as a phishing or scam attempt, directing users to potentially harmful websites.

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-without-human-verification-game-hack
    • http://pescatun.es/images/robux-gainer_GM431946152.pdf
    • http://pescatun.es/images/roblox-password-hacker_GM431946152.pdf
    • http://pescatun.es/images/free-mojang-account-with-minecraft_GM479516143.pdf
    • http://pescatun.es/images/get-free-robux-no-verification_GM431946152.pdf
    • http://pescatun.es/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://pescatun.es/images/pokemon-go-free-619_GM1094591345.pdf
    • http://pescatun.es/images/app-master_GM406889139.pdf
    • http://pescatun.es/images/roblox-phantom-forces-hack_GM431946152.pdf
    • http://pescatun.es/images/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://pescatun.es/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://pescatun.es/images/free-hacks-for-coin-master_GM406889139.pdf
    • http://pescatun.es/images/coin-master-hack-online-pc_GM406889139.pdf
    • http://pescatun.es/images/androeed-ru-minecraft_GM479516143.pdf
    • http://pescatun.es/images/coins-for-pokemon-go-free_GM1094591345.pdf
    • http://pescatun.es/images/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://pescatun.es/images/coin-master-hack-ios-cydia_GM406889139.pdf
    • http://pescatun.es/images/how-to-get-robux-without-paying_GM431946152.pdf
    • http://pescatun.es/images/tiktok-download-free-jio-mobile_GM835599320.pdf
    • http://pescatun.es/images/robux-free-co_GM431946152.pdf
    • http://pescatun.es/images/minecraft-hacks-xbox_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486b.bin
6bb369b1d2c7f2677280db5fcf501d375070926ee13e9090b5b1ecff310d2acf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486B 26492 bytes
font_01_sfnt_off0000856c.bin
69162c0303826e3a88150cee7b6b12b50ba56e04bc46253c0e5eb9f80ac8a399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x856C 19224 bytes

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