Malicious PDF — malware analysis report

Static analysis result for SHA-256 4272005c2b3032b1…

MALICIOUS

PDF

42.4 KB Created: 2021-05-16 04:55:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2994dda2066670ff106df0e457c508a0 SHA-1: f970b6cb6e0ecc4288c7fd27f573c1b9fef4b8e4 SHA-256: 4272005c2b3032b15d252169b5ea0bc323bd44476de2eb1ac598e1d8d758bcbb
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA to lure the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that likely serves as a download for a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-roblox-clothes-boy-game-hack
    • http://gops.pruszczgdanski.pl/images/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/real-robux-codes_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/free-mod-apk-coin-master_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-without-verification_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-spin-free_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/who-to-get-free-robux_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-reward-link-2021_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/apps-for-free-robux_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-card-collection-hack_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/minecraft-for-ps3-free_GM479516143.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-on-facebook_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-hack-tool-v1-9_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/coin-master-hack-2021-free_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/roblox-hack-com_GM431946152.pdf
    • http://gops.pruszczgdanski.pl/images/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • http://gops.pruszczgdanski.pl/images/earn-rbx_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004717.bin
4e55b6475d7eb1e41fa5645f4427a91eb753729d80d6a5ce00dfa27ced90bf9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4717 26776 bytes
font_01_sfnt_off000082f4.bin
ff0928d05cd2328f5f6db263fee94a7b5023d77c4cae175890f1311eb4a8d902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82F4 18400 bytes

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