Malicious PDF — malware analysis report

Static analysis result for SHA-256 129c0f49a052847e…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 07:39:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fac6c051e540faf965d5934ca66da050 SHA-1: 70229e0ce5f58724ff35c67755bb6c313a60e88d SHA-256: 129c0f49a052847e3bb6980a36e55f546fb554966242e50dcecad0d1b6ece827
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA lure to entice users to click on a link, which leads to a download. The embedded URL, https://netcdn.tw/app/431946152/download-roblox-hack-robux-game-hack, is likely the distribution point for a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/download-roblox-hack-robux-game-hack PDF link annotation
    • http://ines.co.rs/images/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/wwwfree-robuxcom-free-robux-now_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/roblox-music-script-hack_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ines.co.rs/images/free-400-spins-coin-master_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
font_00_sfnt_off00004f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F43 27868 bytes
SHA-256: 4ad972dea7e9988b9ce8d86e2aa380a9464a671de245f8f7b049d44f4f686026
font_01_sfnt_off00008d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4A 18828 bytes
SHA-256: 9d673957b867ebc9731d6ca69b5ff8b6b26ca63e15c527a7c230a1ca8a6b20ec

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