Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21a9fb4ab1f1ad4…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 02:32:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ece622da0ce9152f6fb55bca2e1b3f6 SHA-1: 1e3928f6fe8aaf62793d9d2ba179df65b41f403b SHA-256: a21a9fb4ab1f1ad445e7c61c8c62bad3d3e42fa99cced18742c14a607cbd7e96
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to resources related to free in-game currency and cheats for popular games like Roblox and Coin Master. The presence of a "download button" heuristic and the ML classifier's high confidence score suggest this document is designed to trick users into visiting these links, likely leading to malware downloads or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-roblox-app-how-to-delete-game-hack
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-coin-master-game_GM406889139.pdf
    • http://lib.kunci.or.id/repository/i-want-free-robux-please_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-remove-anti-cheat_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-robux-cards_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-stuff-for-free-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-gamepasses-on-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-use-cheat-engine-on-roblox-without-shutdown_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-accounts-for-roblox-with-robux-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-rich-roblox-passwords_GM431946152.pdf
    • http://lib.kunci.or.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdf
    • http://lib.kunci.or.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdf
    • http://lib.kunci.or.id/repository/cheats-coin-master-free-spins-and-news_GM406889139.pdf
    • http://lib.kunci.or.id/repository/error-roblox-hacker_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-app-free-download_GM406889139.pdf
    • http://lib.kunci.or.id/repository/her-roblox-acount-got-hacked_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://lib.kunci.or.id/repository/is-tiktok-free-to-watch_GM835599320.pdf
    • http://lib.kunci.or.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003055.bin
0bbde8750c020b41da6340004b02dfb16ff3a18bcd74662bd88cbce4436a7299		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3055 22260 bytes
font_01_sfnt_off000061d6.bin
b293dcc73ca5e5a2dd507dc0d0e27c575f7a986a23ecba3e9ee32eed3b9e737a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 19264 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.