Malicious PDF — malware analysis report

Static analysis result for SHA-256 519a3c4d2b95f734…

MALICIOUS

PDF

37.1 KB Created: 2021-06-27 18:42:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f6cdd2da2718064182dc86fa8dadd971 SHA-1: 1b2f0576b83da7459ff5ec096b4a62a08478fba8 SHA-256: 519a3c4d2b95f7346823dcc920cc0e3abf7ffc585c517bfe4413437139c3ba87
102 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free VIP admin commands for Roblox' and includes a mass external PDF link farm. The primary URL, http://netcdn.co/app/431946152/free-vip-admin-commands-with-all-permissions-for-roblox-game-hack, likely serves as a download point for malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm and download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-vip-admin-commands-with-all-permissions-for-roblox-game-hack
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/minecraft-java-edition-code-free_GM479516143.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/best-roblox-game-to-hack-on_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-someone-thinks-im-hacking_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/ap-get-free-robux-and-tips-for-roblox-2021_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-robux-discord_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-hacked-have-no-pin-code_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/20210-free-robux_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/rose-v1-download-roblox-hack_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-followers-for-tiktok_GM835599320.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-minecraft-printables_GM479516143.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/free-roblox-accounts-user-names-and-passwords-2021_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-how-to-get-free-robux-no-survey_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/claim-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-superhero-city-cheats_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/roblox-adidas-free_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/aimbot-hack-roblox-rb-world-2_GM431946152.pdf
    • https://elearning.mtsnkotajayapura.sch.id/__statics/gudangsoal/files/how-to-redeem-free-codes-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003634.bin
dde2f374c8a4ec9ba2519879cf5da700fa4e907bb9e37a0e3ec5aec094060d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3634 22772 bytes
font_01_sfnt_off0000691b.bin
27a53b368a24fca387a70bc402337ac2edd9384db40258787c1e1b42392a4c58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691B 20136 bytes

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