Malicious PDF — malware analysis report

Static analysis result for SHA-256 255643f2408ef473…

MALICIOUS

PDF

48.0 KB Created: 2021-06-09 01:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e02a43e95a74aaedd00cb1d53e3225e4 SHA-1: da48da8a4e46cddaf26a74b6ce7ca352e43e400c SHA-256: 255643f2408ef4739459af403e97d504190d7c5159a8f4266b4cb6b2140b6644
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into downloading a potentially malicious application from an external URL. The document body and embedded URLs suggest a theme of game-related hacks or downloads, which is a common lure for malware distribution. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-download-apk-free-game-hack
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-coin-master-hack-no-verification_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/google-moon-active_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/2021-free-spins-coin-master-link_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-game-hacks_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/robux-hack_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-links-coin-master_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/avatar-de-roblox_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/earn-rbx_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-minecraft-for-kids_GM479516143.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-reward-link_GM406889139.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-hack-roblox_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/cheat-engine-bypass-for-roblox_GM431946152.pdf
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-speed-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f70.bin
2edce9e1f82712ee00daeeeab6c29bf1fb2685261fa2883e9591e2b5ee2a3eab		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F70 27004 bytes
font_01_sfnt_off00008cd9.bin
5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD9 2872 bytes
font_02_sfnt_off00009695.bin
21c1f2c5fa80bf75c1101b652e5f60eb973677b955cb3cb57995512bd1258192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9695 19028 bytes

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