Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee909eb8687496b…

MALICIOUS

PDF

35.7 KB Created: 2021-05-25 07:30:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eda07d804273fd65a647b73c81d2de7d SHA-1: 55fb22ebd3daf271693a2e2554dc88ed71824628 SHA-256: dee909eb8687496b9aaa3f371104ba57ce8c1fb2785bdbdf3f84326677a705f6
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious and uses social engineering to trick users into installing software or downloading files. It presents a fake download button and lures users with promises of free game hacks or generators, directing them to external URLs. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/835599320/tiktok-views-free-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/500-free-spins-coin-master_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_002_off00002ed9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2ED9 26372 bytes
SHA-256: 0f7ff5acefd986d85a2f9b0366c7dec7ceab0bcd85751ad55f85b6aa1fcbbe8e
font_01_sfnt_off00006bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB7 17752 bytes
SHA-256: ed90b125ba9f9ca56523df41571dae51d579609882fb5a6f38a0996a644814a5

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