Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc03a1f937eddf7…

MALICIOUS

PDF

37.9 KB Created: 2021-05-22 08:07:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ac4a9bb674eebf33f168f59f3f5ec044 SHA-1: 72d413200406b19b36c9c54c6f92086eb90ecff5 SHA-256: abc03a1f937eddf7d90d3bf2701e779e9dfe08f7bd6fe7d3ec5b4659522361e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'Roblox Hack Client' and 'generator', which redirects to a malicious URL. This lure is designed to trick users into downloading potentially unwanted or malicious software. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at driving users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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 https://netcdn.xyz/app/431946152/roblox-hack-client-game-hack PDF link annotation
    • http://cornerwebstudio.com/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/100-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-promo-code-to-get-free-robux_GM431946152.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
stream_002_off000034e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E8 26756 bytes
SHA-256: 3297784dd9528044f33a753ff8b44ccdf1844977660653c3b2d36972c3e70b1d
font_01_sfnt_off00007262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7262 18408 bytes
SHA-256: 550f62bb1f49814ef42b1b735b63b4edf215944f9d7482118736a3d91d594bfc

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