Malicious PDF — malware analysis report

Static analysis result for SHA-256 6944d826a52c0e93…

MALICIOUS

PDF

43.9 KB Created: 2021-05-15 00:58:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f04f5e2d254a2c0e173a20b0762b0780 SHA-1: 78f2bf46215091db9da7a139ad4b756ea667e846 SHA-256: 6944d826a52c0e935f64ab90151348a8d6e05f6076fa0599a141a852b6f59916
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains embedded JavaScript and a large number of external links, many of which are presented as "hacks" or "free spins" for games. The embedded JavaScript likely facilitates the redirection to these malicious URLs, which are designed to trick users into downloading further malware or engaging in fraudulent activities. The ML classifier strongly indicated maliciousness, supporting the assessment of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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/free-spins-coin-master-april-2021-game-hack
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/hackear-coin-master-sin-verificacion_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-hack-using-lucky-patcher_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/minecraft-free-ios_GM479516143.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/chisel-and-bits-mod-minecraft-pe_GM479516143.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-links-that-don-t-expire_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/minecraft-dungeons-free_GM479516143.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-robux-websites-that-work_GM431946152.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/www-coin-master-hack-xyz_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-robux-obby_GM431946152.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/how-to-buy-robux-for-free_GM431946152.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/create-minecraft-server-free_GM479516143.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-drop-master-free_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/coin-master-daily-free-coins-link_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://www.erealitysolutions.com/assets/dealercmslogin/js/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c0b.bin
fa0cf6470f45c14eb2d44bfdaafaca8ba1d9ef35b16731346b1b72568c0763f8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0B 26040 bytes
font_01_sfnt_off00008922.bin
1b3ee1f783a077a1595d8149d2d089b96120ec8e3b888397002dff6814e01a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8922 18360 bytes

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