Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ff61a440d731bf…

MALICIOUS

PDF

45.1 KB Created: 2021-06-04 05:01:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0d1f4312edca4eb61103303efbeb3223 SHA-1: 2605b08beb752d75dd13d5d156f6d3cab112a683 SHA-256: 24ff61a440d731bfe3171fe63b1b667a294112d5de067b1f142ec3cb73d39ff2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic indicating it links to a game hack lure, specifically directing users to 'https://netcdn.online/app/406889139/coin-master-game-hack-app-download-game-hack'. This URL is likely a redirector for a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to game hacks and download prompts, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.online/app/406889139/coin-master-game-hack-app-download-game-hack PDF link annotation
    • http://perpustakaan.iaiqi.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-boxing-simulator-cheats-xbox-one_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/oprewards-com-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/hack-coin-master-without-verification_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_004_off000053eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53EB 24664 bytes
SHA-256: 8dc1cf0ba475f9ab30f05962c7637a894a707ec4b4a82795610679f99d026027
font_01_sfnt_off00008c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C59 18732 bytes
SHA-256: f404071305b689e90b7e8211e9e9c7c0bd06c22f48a22ec113b2942a02d780a2

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