Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f939de57cac3b1…

MALICIOUS

PDF

41.8 KB Created: 2021-05-14 14:21:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6661a8d5eaa2fb9476df82c96be1dcd0 SHA-1: 7fcacbad9aaff2c2d2d937291a27f7ea6f4a4c82 SHA-256: 35f939de57cac3b1ee882f506c781dd95bff7ff0be4eb88900cd2c60d42fdefc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting "Coin Master Hack App" and "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-hack-app-game-hack. The document body and embedded links suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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-hack-app-game-hack In PDF document text
    • http://kingmusic.pl/images/how-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-game-hack_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://kingmusic.pl/images/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://kingmusic.pl/images/hack-my-spins-coin-master_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_off00004a7a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A7A 24276 bytes
SHA-256: b5b0309b33a8082adae6ebf96348eefb048a6af6c3be06aa79f1664c3d15fb55
font_01_sfnt_off00008231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8231 17892 bytes
SHA-256: f939fda97690d6a809d743b342add8ec97984f5e978608423f32dd39679c4d64

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