Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8cf545f6a59c3b1…

MALICIOUS

PDF

36.9 KB Created: 2021-05-22 15:58:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4fd3efc8f766b0e0345027c55b8a3c52 SHA-1: 411d417ec91faf8dc6b0ec6ef6dde3bbf55a8451 SHA-256: f8cf545f6a59c3b16a94afc75c6f57fdc1fdeb4cda44c1c60b24f2517a7592c2
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase ('CLICK HERE TO ACCESS ROBLOX GENERATOR') designed to trick users into visiting a malicious URL. The document body and heuristics indicate a lure related to game hacks and generators, specifically mentioning 'Free Robux'. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a site that may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-robux-link-game-hack PDF link annotation
    • http://dieter-sauter.com/images/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-400-spin-link-today_GM406889139.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_off00003232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3232 28104 bytes
SHA-256: 7e8003dfedebad1a3e3f4d64783d5069af1ce0ee0838470dfb95c6cced8121f7
font_01_sfnt_off00006f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F31 18304 bytes
SHA-256: a4aae99c46e0a0f586669c3aecb8c0d6e5f23962dc49b2f1654f133382ac5317

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