Malicious PDF — malware analysis report

Static analysis result for SHA-256 6165049ed8b19dcb…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 13:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18a41deb20c41ceb2ae190f2387065a5 SHA-1: a1b4c1f98325c31c3d8ddb85deb7d0da30d32c4d SHA-256: 6165049ed8b19dcb359ef768bb367a6a2e432ca1e07a6678ddb2c5bb22964c8f
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA or human verification prompt to trick the user into interacting with it. It also contains numerous embedded URLs, with the primary one being http://netcdn.co/app/431946152/easy-quick-free-robux-game-hack, which likely leads to a malicious download. The ML classifier strongly flagged this PDF as malicious.

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 http://netcdn.co/app/431946152/easy-quick-free-robux-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-card-hack-apk_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-trial_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-dr-benx-hacken_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-software_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-115-2-hacks_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-free-clothes-template_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-your-self-getting-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-coins-in-roblox-assassin_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-gaben-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-co_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/optifine-mcpe_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-hair-red_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f70.bin
a78926a5ca2e01a34746b874cb1b1c8d800b24d79ce4b806bad0811ae5787eb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F70 22392 bytes
font_01_sfnt_off00006190.bin
43e1b474adc365c36c839816192268e32c29c6b1f5954951e012ae04ec2ff3ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6190 19344 bytes

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