Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3433bedd98d483…

MALICIOUS

PDF

40.8 KB Created: 2021-04-27 09:28:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3dccbb1807b6699c0240dc1fec3f2c6c SHA-1: 5564cbb499970a46d4e0fb59fe6d59493dc901b4 SHA-256: ce3433bedd98d483611502cdf35ea6ddedd80a562f5efee66db1fabdba0841bb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a primary external URI pointing to a file hosted on 'netcdn.xyz', likely a payload. The document body, though heavily obfuscated, suggests a lure related to game cheats. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document may be instructing the user to decrypt a subsequent payload, a common tactic for evading security scans. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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 https://netcdn.xyz/app/431946152/dragon-ball-online-roblox-cheats-game-hack PDF link annotation
    • http://www.saburai.ac.id/elibrary//repository/free-api-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/www-roblox-com-robux-free-download-no-surveys.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-robux-no-buying-armanda.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/como-tener-robux-gratis-hack.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-roblox-toy-redemption-codes.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/roblox-obby-gives-you-free-robux-july-no-password-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/how-to-get-free-stuff-on-roblox-catalog.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/create-own-free-skin-roblox.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/free-rich-roblox-accounts-2021.pdfIn PDF document text
    • http://www.saburai.ac.id/elibrary//repository/cheat-engine-roblox-2021.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000041e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x41E4 25068 bytes
SHA-256: 949954d86a4972bb1aeaf594cdc34a1d936a57573e2c4227531dd9122b68b7bc
font_01_sfnt_off00007be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE3 18860 bytes
SHA-256: fbfcd9e1a975d5f225e418779f31f131588ab7b40f510cb44aab538790368b4c

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