Malicious PDF — malware analysis report

Static analysis result for SHA-256 eafe57dfc05689d5…

MALICIOUS

PDF

40.2 KB Created: 2021-05-23 23:14:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f67fc98d351e6055b510f4a97c27d15d SHA-1: 767da58da69d198f0a0043235295915fa1616fe1 SHA-256: eafe57dfc05689d58d5c87698d36efb1ff6a25f0cd7cf3dd0da8f356940e3471
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a call-to-action phrase, directing users to external URLs that promise free Robux or game hacks. The presence of multiple suspicious URLs and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8010

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/robloxmatch.com-free-robux-game-hack
    • https://sponajaib.com/ckfinder/userfiles/files/tiktok-free-recharge-500_GM835599320.pdf
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-pin-codes_GM431946152.pdf
    • https://sponajaib.com/ckfinder/userfiles/files/robux-generator-no-survey_GM431946152.pdf
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033ca.bin
17c22358d8fff5f5c43c3b414b8f76b1fc9a22ec818bb6bb1071757e56ff3d73		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33CA 26248 bytes
font_01_sfnt_off00006fb2.bin
889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 2984 bytes
font_02_sfnt_off000079de.bin
2b124103857761273712b4ba35fd952769b133cd88df24246d0abbfc30abcd7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79DE 18912 bytes

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