Malicious PDF — malware analysis report

Static analysis result for SHA-256 6798f53f896b93fc…

MALICIOUS

PDF

36.7 KB Created: 2021-05-22 00:06:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dc1c09d225b096d15b87dd6ed10dc1c5 SHA-1: 69395b2f15f88010298e9948c05419219f61e45f SHA-256: 6798f53f896b93fc63ee960846f150724b654e6b4b46fd37cd4dc1c0798f7e63
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a call-to-action phrase, luring users to a website promising 'free Robux'. The primary URL, https://netcdn.xyz/app/431946152/rbx-free-robux-game-hack, is associated with a game hack lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/rbx-free-robux-game-hack PDF link annotation
    • http://www.studiomilone.net/images/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://www.studiomilone.net/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.studiomilone.net/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://www.studiomilone.net/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.studiomilone.net/images/robux-no-human-verification_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_off000030cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CC 27920 bytes
SHA-256: dd22bc03149eeeba0770e52c395fb3e66a9fab7011c6584f37a3eaf7dcbe070c
font_01_sfnt_off00006f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2E 18012 bytes
SHA-256: 03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208

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