Malicious PDF — malware analysis report

Static analysis result for SHA-256 021042c712208774…

MALICIOUS

PDF

48.9 KB Created: 2021-06-10 23:26:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 562c1a3712a280c99a16b1bc2baf4c2c SHA-1: 615c589644be11ef40d9bdcb1d33311ff6160549 SHA-256: 021042c712208774ad6a1b2135acf1deb323587e50076c3ec40694f50e970579
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with malicious links. The embedded URLs, such as https://netcdn.tw/app/431946152/bubble-gum-sim-roblox-hack-game-hack, likely lead to the download of a second-stage payload. 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/bubble-gum-sim-roblox-hack-game-hack
    • http://stimaimmi.ac.id/perpustakaan/repository/real-free-robux-generator_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-800-robux-for-free_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-level-3_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/robux-hack-tools_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-accounts-dantdm_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-hack-us_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-coin-master-for-iphone_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-apk-2021_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/free-roblox-catalog-items-may-2021_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/free-money-links-coin-master_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/get-free-robux-com_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/working-coin-master-hack_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/claim-free-robux_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/roblox-hack-2021-ipad_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/hack-robux_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/free-robux-codes-generator_GM431946152.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://stimaimmi.ac.id/perpustakaan/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052eb.bin
b71e942aa0838e8c494fb968693afd7ed37e1c0e90123ef4c767b719cb23cc82		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EB 27928 bytes
font_01_sfnt_off00009160.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 2832 bytes
font_02_sfnt_off00009b11.bin
d06afedef3b7b0c7d55785e12605aebae386a54b5acb9db78dd9149759bba887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B11 18700 bytes

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