Malicious PDF — malware analysis report

Static analysis result for SHA-256 025e2809f8bb7c3e…

MALICIOUS

PDF

47.8 KB Created: 2021-06-03 05:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64a90297f0690720bc0c65c884ee3503 SHA-1: f81ef8c1e4ac3690b48b517cc56c5010b0c8a570 SHA-256: 025e2809f8bb7c3ea1634dce9f85322c2e7f499ab646c854213bfdcffa96520c
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a heuristic firing for an external URI, indicating it is designed to redirect users to download potentially malicious content. The document body's title, 'Robux Hack No Verification', and the 'Password-protected archive handoff' heuristic suggest a social engineering tactic to trick users into downloading a payload disguised as a cheat or hack. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/431946152/robux-hack-no-verification-game-hack
    • http://perpus.i2s-learning.com//repository/give-me-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/coun-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/roblox-weird_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/instagram-free-coin-master-spins_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/roblox-adopt-me-hack_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-roblox-clothes-for-your-avatar_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/microsoft-bing-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/rbx-claim_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-coins_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/minecraft-packs-free_GM479516143.pdf
    • http://perpus.i2s-learning.com/repository/best-free-minecraft-hacked-client_GM479516143.pdf
    • http://perpus.i2s-learning.com//repository/spin-hack-for-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-roblox-avatar-ideas_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/buy-robux-free_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005011.bin
eb93b6658e4c97213438374ea21bbcc29c8430228704c84c02252bf656c4122c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5011 25808 bytes
font_01_sfnt_off00008a21.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 5596 bytes
font_02_sfnt_off000096c9.bin
770f8f6a3c3ea9ac3c319881d9f8005aae44889e6d1fc0dc42f8814bbcec8619		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C9 18604 bytes

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