Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b1b945fb61bcdf…

MALICIOUS

PDF

45.4 KB Created: 2021-06-04 00:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 248c2fa4e34a5a52d83a4b9453fa2fe2 SHA-1: 10f141bdf2f0a0ca269476531c51ff1397692fba SHA-256: f5b1b945fb61bcdf9d5ddb54da090eb1a1c77dead029ab038e6ada9ab143183d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game hacks, specifically linking to a URL that appears to be a redirector for malicious content. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to a game hack generator. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a malicious website, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/431946152/free-robux-without-downloading-anything-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-xyz_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-hack-coin-master-spin-ios_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_off0000510b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510B 24760 bytes
SHA-256: b0d211d99e80ee387edaf8a6dc69d3bc59f9e684c8be85a63f96cb78c347bc6c
font_01_sfnt_off00008a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A1F 19880 bytes
SHA-256: 6bc5cab104a17e5be196146aaeb40b5940258b3e295a46c016ac1ce7c3ec9493

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