Malicious PDF — malware analysis report

Static analysis result for SHA-256 b344e7d1ab193085…

MALICIOUS

PDF

36.9 KB Created: 2021-05-14 14:33:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 483f5c71390e6cdacaf2151d31b98267 SHA-1: 1f9b0ecf0b0ec8f1a2870d947fc5dd777e8e366c SHA-256: b344e7d1ab19308552a560daf0df35c881fe26f1e16cfc9db864992ff85088a0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link that leads to a 'free generator / game hack' lure. The document body also contains text related to 'Bux Free Robux' and a call to action to access a generator. The embedded URL, https://netcdn.xyz/app/431946152/bux-free-robux-game-hack, is identified as malicious infrastructure, suggesting the document is designed to trick users into visiting a potentially harmful 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/bux-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_off000032a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A7 26124 bytes
SHA-256: 85c94785a55f2f0141f6968e1335879584386b24dcaf31eeb0ff021dfbab21e0
font_01_sfnt_off00006fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAC 18012 bytes
SHA-256: 48dadac1a540eb24f39d188e0eb07df2fd2c4cea4184d8a92cbd726ce4786484

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