Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec859d488cf7018…

MALICIOUS

PDF

38.4 KB Created: 2021-05-18 00:36:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cad8f2ad4ebd4be213b8c40292007575 SHA-1: 50b386bd27efe537358a22b2fcbb914b7866fb9c SHA-256: 8ec859d488cf70187b8741103d5b28ad792ba21adc47103e7b5435daf62471e2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector disguised as a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-100-spin-game-hack, is the primary indicator of this malicious lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for phishing or malware distribution.

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/406889139/coin-master-100-spin-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000032c5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32C5 30284 bytes
SHA-256: f0f7c40fee4d9d8c72e0b8884d975ed24b7ab5af358ae66c6d7556efbd648627
font_01_sfnt_off000075d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 18000 bytes
SHA-256: 01f803363f7eeb4dce0f816621254ac49837589185e144589db73f807fad6798

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