Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3fdaeae286d1e5e…

MALICIOUS

PDF

41.7 KB Created: 2021-05-19 08:03:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ccbbf8ac21ec5bdfa5510ad9b3d0445b SHA-1: 30ee0feb72d9e14145024bd26e6ba9643edd7ec1 SHA-256: a3fdaeae286d1e5e012b1cbe2d42f62f1e06b33aeb357a5b862f28b1982e7001
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA or human verification prompt, a common lure to trick users into clicking malicious links. The embedded URLs, such as 'https://netcdn.xyz/app/406889139/como-hackear-coin-master-2021-game-hack', likely lead to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/como-hackear-coin-master-2021-game-hack
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-spins-for-coin-master_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/2021-free-coin-master-spins_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/master-coin-hack-app_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-minecraft-wallpaper_GM479516143.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/easy-robux-hack_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/was-minecraft-ever-free_GM479516143.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/robux-today_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-robux-site_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/blox-fish-free-robux_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coinmaster-blogspot_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/earn-free-robux_GM431946152.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/coin-master-free-daily-spins-today_GM406889139.pdf
    • https://pasangindihomemagelang.com/ckfinder/userfiles/files/free-games-like-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004985.bin
f7dddd5ad5b3f63a20eff2d79f0a1bdee99e44929b1b45310891a8e65904a91e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4985 24232 bytes
font_01_sfnt_off00008065.bin
7d079b1918a151c222a156c250c5aa0e1b0afb08b6f17fdb7ccf3df79397c72b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8065 18380 bytes

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