Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e68a8aba052cfac…

MALICIOUS

PDF

31.8 KB Created: 2021-07-24 08:45:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1c4de85e94bc38b2be5cdc54c421b640 SHA-1: c92d6d0323a88e8e41d6346325bb344ebcb4adf2 SHA-256: 4e68a8aba052cfacf6b48da0a75d524d923351b0abe7ccc3d47e7bc359b9d47e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to free Robux and game hacks, directing users to a malicious URL. The ML classifier strongly flagged this PDF as malicious. The embedded link is designed to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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 http://netcdn.tw/app/431946152/rbx-gg-free-robux-game-hack PDF link annotation
    • http://www.jureclomas.com.ar/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.jureclomas.com.ar/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2953 21796 bytes
SHA-256: d1c21dc628fdc25c45631b947546b1d07517761ff45981148f6a597b9c5a987a
font_01_sfnt_off00005965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5965 18488 bytes
SHA-256: 58bcba1ef06bd0a2056a016a87df266bed4ba8eb199aa87866e94188c0b37d77

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