Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38a3aebd38cdd7a…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 23:02:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5349613182f8a956d34dc4ceebffc3d6 SHA-1: 6b1208d2eb90575c6f5f29139428d4cab108ec65 SHA-256: d38a3aebd38cdd7a50517b8127b80833fb07b12ce25b55e64595624ba2fee307
82 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, specifically a fake CAPTCHA or human verification prompt, designed to trick users into interacting with embedded links. The primary external URI, https://netcdn.tw/app/431946152/free-robux-codes-2021-and-how-to-imput-them-game-hack, suggests a potential download or redirection to a malicious site. The document body, though partially corrupted, contains text related to 'Free Robux Codes' and the malicious URL, reinforcing the lure's theme.

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-robux-codes-2021-and-how-to-imput-them-game-hack
    • https://elibrary.ikhac.ac.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-t-shirt-free_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/robux-free-promo-codes_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-free-robux-com_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/appsmob-coin-master-hack_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/pokemon-go-free-8-km-egg_GM1094591345.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-ids-for-free-spins_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • https://elibrary.ikhac.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/free-robux-hack-generator_GM431946152.pdf
    • https://elibrary.ikhac.ac.id/repository/how-do-you-hack-minecraft_GM479516143.pdf
    • https://elibrary.ikhac.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050dd.bin
6d24e5d579085c34daddc083b8ac710ebff08ec5e92b1717d8a8b01682b38566		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50DD 25268 bytes
font_01_sfnt_off00008bb4.bin
1d945e90fefb0a5cef8a25a84b245dfea694751b845e39001bb2215dfdae52e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB4 19460 bytes

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