Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b36382a6d7bdd1…

MALICIOUS

PDF

39.1 KB Created: 2021-05-13 20:35:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ba38fe32ec87ba1fa140b5ca1a05e22 SHA-1: 5b3bc70dde4a9e08a86052ab5530e2f39060cbbe SHA-256: 98b36382a6d7bdd138e1896f5544ce66b0cfc3bdddc1f7a2ffdaf80748e0d3c5
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The document body and embedded metadata reinforce this lure. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-safe-game-hack, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-safe-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B8 25452 bytes
SHA-256: 3d874ced7e02c8f7b8a514a62ab89c0b22c99fe6606ee3a776be42ccb6f965aa
font_01_sfnt_off00006ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off0000772e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772E 18244 bytes
SHA-256: 393a0339ec2761f14ea9b29efa8c9c5fc9788b4979bd41a030a3ecef46023b5f

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