Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf24846f54ac86e7…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 08:37:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b5843baeeef2b9d9e3d2f2bd80882afe SHA-1: eb31612562317ba1b96f6914fd75baff29f6e5cd SHA-256: bf24846f54ac86e7b56548fd2cdf500311e97675d0ddab3006cf2f68bf679709
82 Risk Score

Malware Insights

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

The PDF document contains lures related to free in-game currency for popular games like Roblox and Coin Master, directing users to download files from provided URLs. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the downloaded content may be encrypted, intended to bypass security checks. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/promo-codes-make-robux-free-robux-game-hack
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-to-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/robux-com-free_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-generator_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-minecraft-mods-for-pc_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-admin-on-roblox-mad-murderer-2_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-100-free-spins-link_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-rape-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/lien-de-hack-money-pour-mad-city-roblox-seson-3_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-rape_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/blox-supply-free-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-school_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-tiktok-foryoupage_GM835599320.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-beta-free_GM479516143.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-boombox-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-a-free-gamepass-on-roblox-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030ee.bin
657f64db09ef8c4bf93b890d79dcc583ce7bc325bfdff0a282d7e970de2c88f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22184 bytes
font_01_sfnt_off0000628f.bin
329a6b7f7d32f8a52b77a05d5e2f0d6688fa8a938cad1d7590b1111801728d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628F 19668 bytes

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