Malicious PDF — malware analysis report

Static analysis result for SHA-256 499c0b5b2d63dd2c…

MALICIOUS

PDF

38.8 KB Created: 2021-05-10 15:19:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f9cbff5be5644fc240c4093959ecc4c SHA-1: 523d53a2d0f86207e70de41bc07b12419dde2eb4 SHA-256: 499c0b5b2d63dd2c70dc5ac5ed9bdd86382fdd1bf5c8cad2ef760db0106511ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body also contains a call-to-action phrase and directs users to the same malicious URLs. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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/free-spins-coin-master-ios-2021-game-hack In PDF document text
    • http://kingmusic.pl/images/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/spin-link_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-apk-hack-2021_GM406889139.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_off00003c2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3C2B 25376 bytes
SHA-256: 7ec726c38b7bda63b5fdfa5be56200a8d586be53102517d57831f563f57fc8fd
font_01_sfnt_off000075b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75B5 18288 bytes
SHA-256: 33dea10a5a633473ad7171de371eb5bee55008ca682d385727c80e9101e9f1e4

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