Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e80b909074ddbf4…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 00:47:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 79a4bbbf246ea22216fd7ef2d597eb11 SHA-1: cd26025012cc4ed00dd79ea3d9626e686f02993e SHA-256: 5e80b909074ddbf47524079715d62bb7f26e39e63bb4359a04bf105f73e206e3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The embedded URL `https://netcdn.xyz/app/479516143/minecraft-items-game-hack` suggests the document is a lure for game-related cheats or hacks, a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-items-game-hack
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-free-coins-and-spins-blogspot_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/minecraft-apk-114-4_GM479516143.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/wurst-client_GM479516143.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-app-download_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/robuxglobalcom_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/give-me-robux-now_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/minecraft-for-free-games_GM479516143.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-claim-free-spins_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/coin-master-raid-hack_GM406889139.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/roblox-18_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/roblox-rewards-robux_GM431946152.pdf
    • http://www.pustakaekspresi.com/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-twitter_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e28.bin
e5c4f04dc841ebae243350593b452f097fbbc37a8d6abba8ca0895df656be85c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E28 25868 bytes
font_01_sfnt_off0000893a.bin
caeb16e535297cef7867413ef169d4348ce7f3d045ac833c9e2bc41e1b311335		 pdf-font-stream PDF embedded font (sfnt) at offset 0x893A 17828 bytes

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