Malicious PDF — malware analysis report

Static analysis result for SHA-256 903bb8de6fb1d90a…

MALICIOUS

PDF

39.2 KB Created: 2021-05-22 21:40:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3ca4cca01e1ad6dde5a88c2c80205da9 SHA-1: b592b523662c63eaecfc46be8a71bd9e529d3a0e SHA-256: 903bb8de6fb1d90aed4adbec746355b286314a9d7c696f51c517c7ca8b09e187
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free spins' and 'game hacks', identified as malicious redirectors. The document body explicitly mentions 'Get Free Spins Coin Master' and includes a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action, reinforcing the phishing lure. The presence of embedded URLs and the ML classifier's flagging strongly indicate malicious intent, likely to redirect users to exploit kits or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/get-free-spins-coin-master-game-hack In PDF document text
    • http://easytransferbrazil.com/images/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://easytransferbrazil.com/images/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://easytransferbrazil.com/images/coin-master-hack-2021-ios-download_GM406889139.pdfIn 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
font_00_sfnt_off00003512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3512 24632 bytes
SHA-256: 36ce542cf091406bea02f6f2c3ae2374b6ff7ae12652359f2ba537fd77a5546a
font_01_sfnt_off00006c62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C62 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off000078e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E8 17884 bytes
SHA-256: b0210710b9f532dde69bab3e54691bd54d84b0d7d990975f20826afd1ba27450

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