Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b5df10d6c8e8fb2…

MALICIOUS

PDF

44.7 KB Created: 2021-05-18 01:13:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e17c3952e708ed9e9bd7219cfb0a2907 SHA-1: e1d15f643cf94efd2b1dc39ff9153bd552750f9c SHA-256: 5b5df10d6c8e8fb22869dafc7faf5b4b99b930d6908bd6bd87379a1674650cbe
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The primary external URI points to a suspicious URL, likely intended to deliver a second-stage payload. The document's content and heuristics strongly suggest a social engineering tactic to facilitate malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/robux-no-human-verification-game-hack
    • http://elitesoftsolutions.com/images/coin-master-free-cards_GM406889139.pdf
    • http://elitesoftsolutions.com/images/body-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://elitesoftsolutions.com/images/roblox-hacks-2021_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://elitesoftsolutions.com/images/free-games-coin-master_GM406889139.pdf
    • http://elitesoftsolutions.com/images/what-are-points-for-in-roblox_GM431946152.pdf
    • http://elitesoftsolutions.com/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://elitesoftsolutions.com/images/robuxmatch-com-free-robux_GM431946152.pdf
    • http://elitesoftsolutions.com/images/roblox-fun-com-robux_GM431946152.pdf
    • http://elitesoftsolutions.com/images/minecraft-apk-free-download-016-0_GM479516143.pdf
    • http://elitesoftsolutions.com/images/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://elitesoftsolutions.com/images/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://elitesoftsolutions.com/images/robux-hack-free-robux_GM431946152.pdf
    • http://elitesoftsolutions.com/images/roblox-script-hacks_GM431946152.pdf
    • http://elitesoftsolutions.com/images/free-spin-and-coin-blogspot-com_GM406889139.pdf
    • http://elitesoftsolutions.com/images/minecraft-xbox-one-free_GM479516143.pdf
    • http://elitesoftsolutions.com/images/free-robux-without-any-verification_GM431946152.pdf
    • http://elitesoftsolutions.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://elitesoftsolutions.com/images/how-to-make-a-minecraft-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049ee.bin
6142408ea6befddd4ad65385cd9ab05e55e937bbcf7344b2ff9ab9beafc4376f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EE 29684 bytes
font_01_sfnt_off00008b6a.bin
b0b7efb10b2be72ca1f11f5058a16b7f706f868f5fc2e7590f71e4c885e22b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 18696 bytes

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