Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbce6d22aefecf23…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 09:47:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bbb24f602eb4949dd4c994f06978293d SHA-1: c2c25dc11409431435beb2381f02d4de52910f4d SHA-256: cbce6d22aefecf23751971c23d881f3b63265cb9c4fe3a4ceedcc904c608fed2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent call-to-action to download 'Roblox Studio Free Robux', which is a common lure for phishing or malware distribution. The embedded link, 'https://netcdn.xyz/app/431946152/roblox-studio-free-robux-game-hack', is identified as a malicious redirector. This indicates the document is designed to trick users into visiting a potentially harmful site, likely to deliver a second-stage payload or conduct credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0366

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.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-studio-free-robux-game-hack In 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_003_off000035a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35A0 37056 bytes
SHA-256: 2032138ea440740c2de318642c0118ce732df466b33bf55827defb265368da32
font_01_sfnt_off000087fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87FB 18484 bytes
SHA-256: 5fdc582f30145a96e28329e80bd45567e2bf6a1df475cf6931e13f95db6331fe

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