Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddee64b32c73e82c…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 06:08:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0023e4f3f830bc0c016bef434b009e1e SHA-1: 17d23ebf36a80a4dc78c5163246e9d0740201326 SHA-256: ddee64b32c73e82c9a022987c6751942794b65e361f26e2ac42ed9c7299c9b35
82 Risk Score

Malware Insights

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

The PDF document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It contains an external URI pointing to a URL that promises free Robux, suggesting a lure for game-related scams. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-get-more-robux-for-free-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-trade-evolve_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000510a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510A 26332 bytes
SHA-256: ae2e314a5592fda19e78eaa10c39125c78dc3fbc33d8167bb3f8a8b17862c619
font_01_sfnt_off00008c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3A 18480 bytes
SHA-256: 444f48c68388f928a3d871611d0873030738946ead4f6691d00c6869f71b1127

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