Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f6fafe191e0bb2…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 07:32:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2aa53815ae8e454460de6dfbd4a52d54 SHA-1: ab9764bd1f4264f49a26c03da307ad2c64bdd513 SHA-256: 95f6fafe191e0bb22fe0d65c7619c7e1592d39edb1b841ca2b3a6ae74465ad5d
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into downloading a file. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs point to a download for 'free gfx roblox game hack', suggesting a social engineering attempt to deliver a potentially malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/431946152/free-gfx-roblox-game-hack
    • http://muslib.unmus.ac.id/repository/face-roblox-free_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-card-link-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-apk-mod_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-october-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-cards-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-today-twitter_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/get-robux-com_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-spins-coin-master-october-13-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-stuff-on-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-minecraft-for-free-on-mac_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/roblox-land-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/easy-robux-today-com_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f62.bin
d3c86201a65d2fc3d4d9b9384fd7a79fce661a41adf079c595fe6beecccf2c87		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F62 24268 bytes
font_01_sfnt_off000086d4.bin
93c837e91696f9c750ee981a8553ec938bcc839a54d12736034a756f397dcd55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D4 17948 bytes

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