Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a83d6b08b4d3eb…

MALICIOUS

PDF

41.0 KB Created: 2021-05-23 17:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6061e5ea0e0397c068bbc5160a1d4d03 SHA-1: 46acd732c28e837c17683dd9aff83210a90cb3a4 SHA-256: 19a83d6b08b4d3ebc53ad23801594ac88506ddfcecc601490d454aa09fa7b00d
82 Risk Score

Malware Insights

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

The document presents itself as a "Robux Hack Me" generator, employing a fake CAPTCHA lure to trick users into interacting with malicious links. Several embedded URLs point to suspicious domains, likely serving as download sites or redirects for further malicious activity. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7499

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/robux-hack-me-game-hack
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/script-executor-roblox-free_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/robux-cheat_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/pokemon-go-free-7km-eggs-july-2021_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ea.bin
ecda47c92f8aa70dba3285903aa18e41cae6f6c022d5d70bc9946c704b8f2f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33EA 28620 bytes
font_01_sfnt_off0000749c.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x749C 2832 bytes
font_02_sfnt_off00007e4d.bin
63c17dbc7d8c7d1de0ff2471750372836806f4a6a54ec4612fcacbe2caf81c31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 18444 bytes

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