Malicious PDF — malware analysis report

Static analysis result for SHA-256 a624389c440b2ece…

MALICIOUS

PDF

35.7 KB Created: 2021-05-15 04:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5ad4d16e4843f64911ee65d5d577d9c1 SHA-1: e6468cf1a38f1e40a0916d818c4f5ba23c29b237 SHA-256: a624389c440b2ece1642fc867e0d55254a72b187ae6342ccba77ada7b5cc4f84
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for a "Coin Master Free Spins 2021 Hack" which links to a known malicious redirector. The document body and embedded artifacts suggest a social engineering attempt to trick users into visiting a potentially harmful website. No scripts were extracted, but the presence of malicious links and the lure indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-spins-2021-hack-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
font_00_sfnt_off000032d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D4 24740 bytes
SHA-256: 95e8eb26f74b86cef28983f04f88e0ddcb156d9b9407ca28a44469618838b0db
font_01_sfnt_off000069b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 18456 bytes
SHA-256: 01aac8443e047fcb7357b1b8ecb4a3fbe01c6e1da05f82155595583d2ef12cbf

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