Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c53e552abaa662e…

MALICIOUS

PDF

41.5 KB Created: 2021-05-19 01:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 429450b5cd8968fdc8b92f7bde9aa2e5 SHA-1: 513c08fbe6817505736a2c7de8e597cae7fa0d82 SHA-256: 8c53e552abaa662e85dc822eb9bc40a1ad20ecedc013539a49362eb332fa4c46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency for games like Coin Master. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting these sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-email-rewards-game-hack In PDF document text
    • http://gamixpaliwa.pl/images/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/clean-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://gamixpaliwa.pl/images/claim-free-robux-button_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_003_off00004890.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4890 24596 bytes
SHA-256: 4cdfa8c18159af71fce23ac63d36ca3ab6fe67892986026fec8a49b4ff162064
font_01_sfnt_off00007fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC9 18216 bytes
SHA-256: e61fab9f8d99b46953a38bd9174b367a9798fa55ae4550c291f399d0802cd730

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