Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b52213da1373e3b…

MALICIOUS

PDF

32.8 KB Created: 2021-07-21 00:13:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 74c97d3f2d42cb8d76b15f6e0616a7db SHA-1: 52520f9438cf103d778dc5b7bc06aeb18def917f SHA-256: 2b52213da1373e3ba4bd5d969da547c67161ff6a2e7bf65a2ea1fcaf35e8da94
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free Robux generator" and "game hack", directing users to the URL http://netcdn.tw/app/431946152/robuxy-com-free-robux-game-hack. This URL likely leads to a malicious payload or phishing site. The document body also contains numerous other URLs related to game hacks and free items, suggesting a broad phishing or malware distribution campaign. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/robuxy-com-free-robux-game-hack PDF link annotation
    • http://perpus.janabadra.ac.id/otomasi/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.janabadra.ac.id/otomasi/repository/how-to-get-free-robux-2021_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
font_00_sfnt_off00002bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBB 22288 bytes
SHA-256: 9c9417490d4062db8f8781b12c45867397b4352181f123bc6b00ea8caebd9dd9
font_01_sfnt_off00005d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D17 18640 bytes
SHA-256: 895c40dcc8ab3e314fdd76083fc6d63a7047cdae3d38e24120e4d24b4e40b9b1

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