Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b81c1a1bbaffbfe…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 12:40:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48c2ca7360be63d22c45f3d24966936c SHA-1: ac7c4557e1f095e8683cecc8ae6cf96e4f8c300d SHA-256: 0b81c1a1bbaffbfe040c9829d91e76ba11c1cd3a00012b42652580445fbe0f50
82 Risk Score

Malware Insights

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

The document contains a lure for free in-game currency, directing users to a URL that likely hosts a malicious application. The presence of a "password-protected archive lure" heuristic suggests the downloaded content may be further obfuscated. The ML classifier strongly indicates 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.tw/app/431946152/earn-robux-for-free-no-offers-or-human-verification-game-hack
    • http://library.fk.upnvj.ac.id/repository/coin-master-spin-pattern_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/app-hack-to-roblox-mod-apk_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-download-linux_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/easy-robux-hack_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-roblox-accounts-2021-with-pin_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-teleport-in-free-draw-2-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-giveaway-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/battle-royale-roblox-hack_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-demonius-free-catalog_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-iron-man-shirt-free_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/epic-game-free-liggiy-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-free-pokemon-go_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-download-no-password_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/earn-free-robux-rbx-blaster_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-legit-no-human-verification_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/a-hack-to-get-the-bage-admin-on-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-real-roblox-codes_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-bc-in-roblox-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000311c.bin
a7f2537d4b84b36e4a8dea10e8b438a23f7ae61e18a3de2deb914a4232496df4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x311C 22904 bytes
font_01_sfnt_off00006469.bin
c4e75c1ff599f4da38e5ccd324047b3eacfc2a66b8c07b50db628e7f997f8c82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6469 19148 bytes

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