Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ff3082a2102572…

MALICIOUS

PDF

40.9 KB Created: 2021-04-23 13:35:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 90c2f8979249a6c2fd01673010db45dc SHA-1: 9816701144cb9243c9aa0d86d0ea3d21e7c9131a SHA-256: 83ff3082a2102572f1ce0811be4f809a308a5f07bf2e48ae99072f6845dd36c3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Roblox Speed Hack' and directs users to a suspicious URL, 'https://netsecure.top/app/431946152/check-cashed-v3-roblox-speed-hack-game-hack'. This URL is flagged as a game hack redirector, indicating a likely phishing or malware distribution attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.top/app/431946152/check-cashed-v3-roblox-speed-hack-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-hack-tools-in-the-game-no-mega.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-free-officer-hat.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-see-in-a-blocked-inventory-hack.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/como-tener-robux-gratis-2021-sin-hack.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/do-you-want-free-robux-copypaste.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/gun-simulator-hack-roblox.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-with-inspect-element-2021.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-on-computer.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/assassins-creed-cheat-codes-roblox.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-free-hats-generator.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_off000042e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42E8 24804 bytes
SHA-256: 852be18600c38fcfcb237ee03c1792c9af85731f668a411f091459fb8bf66e50
font_01_sfnt_off00007c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C07 19004 bytes
SHA-256: 8f84c0ffeea4b164521ba12034e4b2cbcae16962fefdbe6dab8c1ed53c4097d2

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