Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab16d13b1d1030e2…

MALICIOUS

PDF

36.1 KB Created: 2021-05-10 12:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d78154c7b710e8a9cc8dd028ec4ea312 SHA-1: 9d5d87e9d0d82b6c1fbdafc75dcb04cb12fc2e0e SHA-256: ab16d13b1d1030e259573d7a3bc8985b4eaf1e56c7d976ebe235a3145e496be4
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Coin Master Free Coins App' and a prominent 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call-to-action. This button links to a known malicious redirector infrastructure. The embedded URL is designed to trick users into visiting a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

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-coins-app-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_003_off00003383.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3383 25052 bytes
SHA-256: 544487f2d2fdf0b1731c68a2bfa243581cb573c3798cd315f49707dfa6885318
font_01_sfnt_off00006cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 17884 bytes
SHA-256: 3acccbbe7a83c149c22979297be8e0f2d1fa2551ed3d228e44848c7e1eaf2a55

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