Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b6f7b5bd17e423b…

MALICIOUS

PDF

38.0 KB Created: 2021-05-16 22:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 47933bb292f484735c97a9ea2513cb01 SHA-1: 2be3d3100661eb63c9aa958297f052459a807615 SHA-256: 4b6f7b5bd17e423b072b5c7c84d2e9bacfbe75d1bb7ee2708407d42add471806
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-cards-link-game-hack, is the primary indicator of this lure. While no scripts were explicitly extracted, the PDF structure and the nature of the link suggest an attempt to trick the user into downloading a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0130

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/406889139/coin-master-free-cards-link-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
stream_003_off00003078.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3078 24840 bytes
SHA-256: d22389d018178d1cc23ac3d468a6b8996e2eb45460348dc990c2eb75c0411fd2
font_01_sfnt_off00006981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 2956 bytes
SHA-256: aa05c93583c8bb1ea916fd69c8a28a5c303188c92667d4ae562bb4fa0c3eac9a
font_02_sfnt_off000073a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 18056 bytes
SHA-256: 4c00fba11e6222d30ce91962ad0846eff86227a46da4e4704094e367f0981575

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