Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2c9532fb3995f7…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 00:18:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a97ad7b0172e064f88d9e9adbb1c8f13 SHA-1: cf2bfb156c5f8f4d344844f7e050a447d89d3518 SHA-256: 6b2c9532fb3995f71632f2a057e84ddd965a5faad3d4cc17dcc2285873141b95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and text that explicitly mention "Free Spins Coin Master Links" and "CLICK HERE TO ACCESS COIN MASTER GENERATOR", directing users to a suspicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the lure suggest an attempt to redirect users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9498

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 http://netcdn.tw/app/406889139/free-spins-coin-master-links-game-hack In PDF document text
    • http://serviio.org/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://serviio.org/images/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://serviio.org/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://serviio.org/images/minecraft-realms-free-trial_GM479516143.pdfIn 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_off00002b8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B8E 23280 bytes
SHA-256: 816aade7ba8b210726fc8d61f55506b9bf150913b864e655933188b658c128bb
font_01_sfnt_off00006003.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6003 18056 bytes
SHA-256: 07f1a9832fff0ce02b8ea8bcbd6448fb7022c7ac6c85a00fb5b887865844234a

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