Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c217c313bb2714…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 07:03:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 768558ee2173b348227bd64b43795b94 SHA-1: 7216cde5a81268342d8cba37759be53a7f794f76 SHA-256: a5c217c313bb2714f4654a05c8a3f30805221575c9dd0e5b3d2024dd601eb1be
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action lure, suggesting it is designed to trick users into downloading further malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs indicates an attempt to redirect the user to a compromised or malicious site. The document body's content, promising free Robux, aligns with common social engineering lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/is-it-possible-to-get-free-robux-game-hack
    • http://lib.fekon.untad.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-java-free_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-free-c_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-working_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-hack-us_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/robux-download_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-daily-rewards_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/get-free-cards-for-coin-master_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/roblox-free-robux_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://lib.fekon.untad.ac.id/repository/minecraft-hacks-ps4_GM479516143.pdf
    • http://lib.fekon.untad.ac.id/repository/free-robux-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004842.bin
41c8a36d8f95e0d94d9c988df57c1f312314a1543e23d1ead2da84d094854bbc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4842 24996 bytes
font_01_sfnt_off00008045.bin
524b785793646940a6547919a11f6df6f4967036cf63710b5a4934c88ca16ae7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8045 18464 bytes

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