Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda365e8718287d0…

MALICIOUS

PDF

38.6 KB Created: 2021-05-17 04:33:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9f28aba444021876d65a1bab58e78c5 SHA-1: ac48b536fb70d3e1bfced387a507a9fff4af21cb SHA-256: cda365e8718287d0d172dd85ff6cb8bc7cfe00bc646d0b36287b8b6030537849
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for a 'free Robux generator' which redirects to malicious infrastructure. The document body explicitly mentions 'How To Get Free Robux Without Human Verification 2021' and includes a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', linking to a known malicious redirector. This suggests a phishing or scam attempt designed to trick users into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-get-free-robux-without-human-verification-2021-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_off00003474.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3474 26888 bytes
SHA-256: a8e8e21c372307384e3d5265411aae717dd7803e47aaba648608d21fe78a49c9
font_01_sfnt_off00007142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7142 19792 bytes
SHA-256: 2fcc096d095577e17bc813bca386b7e419c64e6aba5a370ab2124621dd0af6c5

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