Malicious PDF — malware analysis report

Static analysis result for SHA-256 9abfe439bf51a39c…

MALICIOUS

PDF

43.6 KB Created: 2021-05-11 20:01:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 498fa113bc1069d8bbb69908d0df4ce5 SHA-1: 91076ff2b9bc922a7efca3b35458fbdca1de0712 SHA-256: 9abfe439bf51a39cd7416b2c25ddac1551b14468db973435cf3243edb8ee09d6
82 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL associated with game hacks, and multiple other URLs that also appear to be related to game cheats. The ML classifier strongly flagged this PDF as malicious. The presence of a visual download button and instructions for handling password-protected archives further indicate a malicious workflow designed to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robux-codes-game-hack
    • http://fobh.net/userfiles/files/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-robux-sites-that-work_GM431946152.pdf
    • http://fobh.net/userfiles/files/roblox-free-clothes-hack_GM431946152.pdf
    • http://fobh.net/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-coins-coin-master-today_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-robux-please_GM431946152.pdf
    • http://fobh.net/userfiles/files/the-coin-master-hack_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-robux-com-real_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://fobh.net/userfiles/files/como-descargar-coin-master-hackeado_GM406889139.pdf
    • http://fobh.net/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://fobh.net/userfiles/files/coin-master-free-spins-link-ios_GM406889139.pdf
    • http://fobh.net/userfiles/files/minecraft-world-free-download_GM479516143.pdf
    • http://fobh.net/userfiles/files/rbx-robux_GM431946152.pdf
    • http://fobh.net/userfiles/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://fobh.net/userfiles/files/robux-page_GM431946152.pdf
    • http://fobh.net/userfiles/files/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://fobh.net/userfiles/files/roblox-com-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004782.bin
70f3f308c33936c16c6687f9ad504f499b0103329d1d0e9d57fb772317ea2d48		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4782 28444 bytes
font_01_sfnt_off0000890c.bin
efd3d7019031a842dae2276fdcf19d9726d4034b37c2d895580446cf97336b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x890C 18024 bytes

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