Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd5c10cb11bf811…

MALICIOUS

PDF

46.3 KB Created: 2021-04-27 20:16:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: cbbe93e255fd36aa86b09713348b3b81 SHA-1: 54317512203dfc5c0a73c6455dbe04becb5bf90b SHA-256: 4fd5c10cb11bf8119626a394925d033486b9d613bd9c6eaa13cacf83e400fb68
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded URLs and a heuristic firing for a browser installation lure, indicating a social engineering attempt. The document body, though heavily obfuscated, suggests a lure related to game hacks, specifically for Roblox. The primary URL, https://netcdn.xyz/app/431946152/roblox-elemental-battlegrounds-hack-game-hack, is likely the download location for a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.xyz/app/431946152/roblox-elemental-battlegrounds-hack-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-alcatel-a5.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-to-play-games.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-for-free-without-downloading.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-youtube.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/boxing-simulator-roblox-infinite-strenght-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-2021-free-robux-generator.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-stuff-from-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-date-of-account-created-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/jeux-de-free-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-obby-husky.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000041a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41A2 29848 bytes
SHA-256: 8f6975f01838e6691d79f260a1c8c9512137fb1062f1dc1ae16b1c9972adcebe
font_01_sfnt_off000083b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B6 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000905e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 19148 bytes
SHA-256: 4c60a8d1d47ec79a3cffbab4483317b8e0881a363e783469d0ae8109d239d430

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