Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7b53ead32c4656…

MALICIOUS

PDF

34.6 KB Created: 2021-05-21 21:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5a0e5903edc2ed39ad2f3437e33fb1d6 SHA-1: 78ea729c5ab27b5cc5ef16d24129c89bbb6eba3d SHA-256: ee7b53ead32c4656dbea49757872d24a19200796c8ae5d30c2d3ab625dbe2a1c
82 Risk Score

Malware Insights

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

The PDF file contains a fake CAPTCHA lure, which is a common social engineering tactic to trick users into interacting with malicious content. It also embeds multiple URLs, including one pointing to a potential download or scam page related to 'Robuxy Com Free Robux'. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/robuxy-com-free-robux-game-hack
    • http://coplaltd.eu/images/minecraft-free-trial_GM479516143.pdf
    • http://coplaltd.eu/images/how-to-robux_GM431946152.pdf
    • http://coplaltd.eu/images/free-robux-just-enter-username_GM431946152.pdf
    • http://coplaltd.eu/images/hack-my-game-xyz-coin-master_GM406889139.pdf
    • http://coplaltd.eu/images/coin-master-apk-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000302d.bin
f44297d4f8824076f087a076fb4f06d2b2d9f3c2f94ed5f9429c850cf230fb37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x302D 23608 bytes
font_01_sfnt_off0000654b.bin
502ad6067225007cfeab5155f8ca615546b56d7ab4478b734f537abd02c25d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x654B 18452 bytes

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