Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4b9c18befef3df…

MALICIOUS

PDF

51.7 KB Created: 2021-05-15 05:35:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f3f68f14055db8acc2350c9318e52b20 SHA-1: d8c9b49bf9a3a0c2ee4a3016b7fe341bbc86a4d5 SHA-256: 0d4b9c18befef3df645d189dae1b4e0ec1b9fb3108f34af02ef768241f4f3a5f
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link for a "free Robux generator". The embedded URL points to a suspicious domain, and numerous other PDF files with similar lures are hosted on related domains. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9348

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.xyz/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack
    • https://malungtreks.com/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdf
    • https://malungtreks.com/userfiles/files/minecraft-112-hacked-client_GM479516143.pdf
    • https://malungtreks.com/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/coin-master-hack-version_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/roblox-comcom_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/minecraft-windows-10-free_GM479516143.pdf
    • https://malungtreks.com/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/coin-master-34-4-free-download_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/free-mods-for-coin-master_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/free-robux-2021-no-verification_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/is-free-robux-real_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/roblox-hack-me-robux_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • https://malungtreks.com/userfiles/files/static-moonactive-net-free-spins_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/wwwcoin-master-hack-apk_GM406889139.pdf
    • https://malungtreks.com/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b23.bin
80c6129ceb584063c279417dc341643500b622e8c1cc39d01e49a5f1ea27024e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B23 35464 bytes
font_01_sfnt_off0000993b.bin
4c3e2db5174821787a4569c9da4979555510caebd15fb9cea35573c139e242bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x993B 3016 bytes
font_02_sfnt_off0000a39f.bin
3cea6d4f9da734904bcc55369e0b79f4621aa36195ab65246c463812034b9480
pdf-font-stream PDF embedded font (sfnt) at offset 0xA39F 19736 bytes