Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d714a18e3963f70…

MALICIOUS

PDF

35.0 KB Created: 2021-05-22 10:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25c09e1dfa358c2070e3373d0a9a98b5 SHA-1: 6208e9a6e6fbb9232746e9bbee9a32f6566917a5 SHA-256: 8d714a18e3963f702fc89a0ea4be749c289e1e1949d81ee90c191107270f8798
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirector infrastructure, specifically advertising a "Coin Master Free Daily Spins Link" and "Coin Master Generator". The document body and heuristics indicate a lure to a game hack generator, which is a common social engineering tactic. The embedded URLs are designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-daily-spins-link-game-hack In PDF document text
    • http://guimaq.com.br/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-that-actually-works-2021_GM431946152.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_off00003161.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3161 23748 bytes
SHA-256: be3bb48dd7ef891173630276c7aa3973547d443159e60128432968e1a4ec55c9
font_01_sfnt_off00006696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6696 18476 bytes
SHA-256: 219409e4a96e727ac7d03afbf10b928993c8ec078f24206d8d8724722cb954a1

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