Malicious PDF — malware analysis report

Static analysis result for SHA-256 425c31d96e23ab54…

MALICIOUS

PDF

38.6 KB Created: 2021-05-10 15:14:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: fb833e7cf0eb7592fbf422bdbc2767d0 SHA-1: b2e65856595c9fea839e0170906b6b2e38cc9d14 SHA-256: 425c31d96e23ab545063cb54e77717c6b4ebff7eec631810986e677171dce8b9
190 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 5

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-200-spin-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_off00003328.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3328 25100 bytes
SHA-256: 2bbbe0157919b345499ac3e358cad4d4855a61cfed86b1a507b18cf87b691485
font_01_sfnt_off00006b2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2B 2956 bytes
SHA-256: aa05c93583c8bb1ea916fd69c8a28a5c303188c92667d4ae562bb4fa0c3eac9a
font_02_sfnt_off0000754e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 18188 bytes
SHA-256: a35637ca0c1e73344ae8561ebd99d9fe87a1140cef0d47f6130cbc63d3e5cf49

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