Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee6c76f77ea7f29b…

MALICIOUS

PDF

45.3 KB Created: 2021-05-19 04:31:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4913a30cadbacc1735399b48bd64e33e SHA-1: 6d35a3aa1f32e52e360a6864244cf1940c64eaa5 SHA-256: ee6c76f77ea7f29b775c862c94ce27cdd7ba05e53defe70489bd91471d87d43c
82 Risk Score

Malware Insights

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

The document body and heuristics indicate a lure for free Robux or game hacks, presenting a fake CAPTCHA to trick users into clicking a link. The embedded URL and numerous other URLs point to external resources, likely for downloading a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-human-verification-or-survey-or-download-2021-game-hack
    • http://perpustakaan.pn-temanggung.go.id/repository/get-more-robux_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/get-free-robux-no-human-verification_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/add-robux_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/download-coin-master-hack-apk_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/minecraft-java-for-free_GM479516143.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/free-coin-master-spins-for-today_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-free-spins-and-free-coins_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-100-spin_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/free-minecraft-shaders_GM479516143.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/10-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/como-hackear-el-juego-coin-master_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/oprewards-free-robux_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/free-coins-coin-master-link_GM406889139.pdf
    • http://perpustakaan.pn-temanggung.go.id/repository/hack-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c13.bin
f176af3c2b0c6b3472604958d488aa120a542f62b836cbebdb59b155c5824667		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C13 27652 bytes
font_01_sfnt_off0000895a.bin
66e5e50e12f5eb49621ab9bcd6ab85026409d616512a452c1eb3339dd9867554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 20136 bytes

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