Malicious PDF — malware analysis report

Static analysis result for SHA-256 8636b2920d166148…

MALICIOUS

PDF

35.2 KB Created: 2021-05-20 13:40:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 30cb6605490009372724ec7913a5a4b4 SHA-1: 74a13c1c47e3a665af3e1af0add8727db1dd22e6 SHA-256: 8636b2920d166148159c0dc221a6c88ecea0308a9e40a10c354551c85001dc4a
138 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a critical heuristic firing for a malicious redirector link disguised as a game hack generator. The document body explicitly mentions 'Coin Master Gold Cards Hack' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. The embedded JavaScript likely facilitates the redirection to the malicious URL, which is a known redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.1396

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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-gold-cards-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
stream_002_off00002f3d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F3D 25664 bytes
SHA-256: 5f310b06f721075dd61969f59df4e55b7aba4693354176a269691810f46e0dba
font_01_sfnt_off0000696e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696E 17964 bytes
SHA-256: adb4edbf0c57abdeeb225f0bd422abdfe2e9b1ff4eb8b752c2c204cd3e2141b0

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