Malicious PDF — malware analysis report

Static analysis result for SHA-256 4047ee8da669c7af…

MALICIOUS

PDF

38.0 KB Created: 2021-05-13 21:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d6402c9b61857733de0a26588b5e31a SHA-1: cd8ec70bf23b2f0a9e63d3a216a1fa05592b29ae SHA-256: 4047ee8da669c7af94b00ed701f949ced8770b15e0af1a72c3cd3497c8d5504b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Free Robux Master' and a prominent call-to-action button, directing users to a known malicious redirector URL. This indicates a phishing or scam attempt designed to trick users into visiting a potentially harmful site. The embedded URL is the primary indicator of malicious intent.

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/free-robux-master-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_off000034f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F9 26364 bytes
SHA-256: c99aabda1a381040c468a9b131d0930ef22e4394fde721d70910f6b452c2a6e5
font_01_sfnt_off00007259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 18544 bytes
SHA-256: 5f92163030842751a82ce86b738a68b4d97fee0a57e838fb4c20f827a47ffbab

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