Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd4c6ff36cdecd4…

MALICIOUS

PDF

41.0 KB Created: 2021-05-18 03:40:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eda6ceffac30bb43469ad7a3a4bc18fb SHA-1: 91c1fe5acdd7afe08692ae5ce869cd15c8b44582 SHA-256: 4bd4c6ff36cdecd450d077003bb0d2c971a124a765475046ecfc979cc4631251
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically designed to lure users into downloading further malicious content. The document body and heuristics indicate a scam related to game hacks and free currency generators. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of a phishing or malware distribution attempt.

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/free-spin-coin-master-hacktoman-game-hack In PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/getrobux-now_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://feuerwehr-rheinau.de/images/free-robux-hack-no-verification_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_off000047a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A1 23984 bytes
SHA-256: 50914c7b60a774c93351db0ade7a5d80a07b3d0498bb4a48bf0618e8510c8282
font_01_sfnt_off00007de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE0 18316 bytes
SHA-256: a162431701ad9c50befa351cb2f766b34b20a7e8a0fbff5e47df8aa15cd4efd7

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