Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d39d6da76ff233f…

MALICIOUS

PDF

41.7 KB Created: 2021-05-11 17:43:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3cdcfe0711118ccbd6790330a34d25f0 SHA-1: d81f06f93dfab7c57f9b2b2fe47dda610d0d11bd SHA-256: 6d39d6da76ff233fc4af1745ef791714cf78094501b3b2e25207d3f13fa97b88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-raid-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow, likely intended to deliver a secondary payload or phish for credentials.

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-raid-hack-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-cheat-robux_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_off00004b5e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5E 23872 bytes
SHA-256: 9945ff34f7d827b685568a29a34141b86a41089ec18f32bf63b44d5c01eb037a
font_01_sfnt_off0000817c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x817C 17888 bytes
SHA-256: 3bcd7f88e9aff6a3f00dfa05e6d37dfcb1a17a5992fabfc54377b1f82d15f42c

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