Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92fe17100b68018…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 12:44:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2af06947a4cf5cd6008118392ade7710 SHA-1: 6552dd533d99b80dfda598af3cfc0386d58594cc SHA-256: c92fe17100b6801844abd7632e459ee8a7bfcc6701813676c29850b3c85198dc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are presented as download buttons, promoting game cheats and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm heuristic further supports its malicious intent. The document's primary goal appears to be directing users to download potentially harmful software or engage in fraudulent schemes.

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.tw/app/406889139/coin-master-hack-mod-apk-2021-download-game-hack
    • http://www.eucorro.com/arquivos/files/fix-error-268-cheat-engine-roblox_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-instantly_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/spin-rewards-coin-master_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/free-thing-sin-roblox_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/how-to-get-free-robux-on-computer-no-hack_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/free-robux-generator-without-verification_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/roblox-invisible-hack-cheat-engine_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/roblox-jailbreak-money-cheat_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/roblox-com-hack_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/mcpe-hacks_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/how-to-enter-paid-games-for-free-roblox_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://www.eucorro.com/arquivos/files/free-robux-you-don-t-have-to-do-anything_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/worst-client_GM479516143.pdf
    • http://www.eucorro.com/arquivos/files/free-unlimited-robux_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/roblox-phantom-forces-hack-mod-menu_GM431946152.pdf
    • http://www.eucorro.com/arquivos/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031f2.bin
09ac7343cdb71085d17a18e448d68a5d207109ce97cd237fb54bf34f3684b241
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31F2 23616 bytes
font_01_sfnt_off00006782.bin
2e0c8884db6cd57ed43f8d315a9bbff67e391c14a9a376a83d1d8791999d1529
pdf-font-stream PDF embedded font (sfnt) at offset 0x6782 19160 bytes