Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb8b956b3e6da06…

MALICIOUS

PDF

46.0 KB Created: 2021-06-09 05:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 121aa1a5b6ac2202bea13e40e9e772eb SHA-1: aa7150f43d036b45a621c9496e11a4e2867111e8 SHA-256: bbb8b956b3e6da06a5a6f6b97855cffe93ee34e496a29209776f8472ffde93cf
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, aiming to trick the user into downloading a file from the embedded URL. The document body and extracted URLs suggest a theme of free game items or currency, common in phishing and scam lures. No scripts were extracted, limiting the analysis of direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-lvl7-full-lua-roblox-game-hack
    • http://bogatyr.com/images/how-to-get-free-tiktok-fans_GM835599320.pdf
    • http://bogatyr.com/images/coin-master-links-for-free-spins_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-free-spins_GM406889139.pdf
    • http://bogatyr.com/images/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://bogatyr.com/images/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://bogatyr.com/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://bogatyr.com/images/free-robux-com_GM431946152.pdf
    • http://bogatyr.com/images/coin-master-hack-apk-no-fb-login_GM406889139.pdf
    • http://bogatyr.com/images/free-100-robux_GM431946152.pdf
    • http://bogatyr.com/images/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://bogatyr.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://bogatyr.com/images/roblox-gift-card-online-free_GM431946152.pdf
    • http://bogatyr.com/images/free-spins-in-coin-master-without-human-verification_GM406889139.pdf
    • http://bogatyr.com/images/coin-master-spin-free_GM406889139.pdf
    • http://bogatyr.com/images/oprewards-points-generator_GM431946152.pdf
    • http://bogatyr.com/images/minecraft-java-free_GM479516143.pdf
    • http://bogatyr.com/images/robloxheroxyz-free-robux_GM431946152.pdf
    • http://bogatyr.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://bogatyr.com/images/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://bogatyr.com/images/easiest-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d6.bin
0127d1b61661dbc605e12154e761b89956680323c8113cfce4d39f1c63b18e73		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D6 26780 bytes
font_01_sfnt_off00009080.bin
b0399b7e6eb43820c3bd46add520a019b86873e5acd9395d65425f6e111845e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 18484 bytes

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