Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69160835ac525db…

MALICIOUS

PDF

37.3 KB Created: 2021-05-20 15:10:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 987b16a16e49edb9b01d0c02e3af8f7b SHA-1: d761fe960d630f469b1973c0d1509300dd9ba8c7 SHA-256: e69160835ac525db5bae49a83470ecf4f9d42d6d3fb9a379c6223cd2bcc031a4
82 Risk Score

Malware Insights

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

The document presents itself as a way to get free Robux, employing a fake CAPTCHA lure to trick the user into clicking a malicious link. The embedded URL and other linked PDFs suggest a phishing or scam attempt designed to lead users to potentially harmful content or downloads. No scripts were extracted from this sample, limiting the analysis of its execution flow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/free-robux-codes-2021-game-hack
    • http://gaeconsultores.cl/images/free-roblox-svg_GM431946152.pdf
    • http://gaeconsultores.cl/images/rblx-city-free-robux_GM431946152.pdf
    • http://gaeconsultores.cl/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://gaeconsultores.cl/images/how-to-get-traded-pokemon-to-evolve-without-trading_GM1094591345.pdf
    • http://gaeconsultores.cl/images/free-robux-safe_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003579.bin
d7d0354c65119b55a261a475ba3ffa5e4c2025126f7fa5c0ddaa6ff4c556f8ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3579 25852 bytes
font_01_sfnt_off00006f55.bin
0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F55 18588 bytes

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