Malicious PDF — malware analysis report

Static analysis result for SHA-256 54558f3bf81cedab…

MALICIOUS

PDF

41.8 KB Created: 2021-04-28 09:52:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c19f42c3cb56e796087febd32a6f10d2 SHA-1: 93715330f073ae0d7d3fe3c7990fbd6785594536 SHA-256: 54558f3bf81cedab0c985c920bc6f354174a7bf3ab279e51be6b293b38494be7
82 Risk Score

Malware Insights

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

The document uses a social engineering lure related to Roblox game hacks, including a prominent "CLICK HERE TO ACCESS ROBLOX GENERATOR" call to action. It contains numerous URLs pointing to potentially malicious PDF files hosted on external domains, suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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-tower-defense-simulator-hacks-game-hack PDF link annotation
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-any-game-hack-script.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-zamasu-dbn-prealpha-hack.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-account-crcker-free-v3million-proxyless.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/trigon-roblox-cheat.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-bux-free.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/cheat-roblox-school-2.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/pastebin-roblox-promocode-hack-2021.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-cheats-online.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-free-robux-no-human-verification-website.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-noclip-in-roblox-cheat-engine-64.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_off00004408.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4408 25616 bytes
SHA-256: 072332b102538cf6d993b65b90dc0f523ce3c74fee9841f666427e47447636f0
font_01_sfnt_off00007f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F00 19140 bytes
SHA-256: f47c53f292d3035e1ca26868c7b4060b54a279dba0ba367cb82a26fbba89086c

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