Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb3b1cb71028ee0…

MALICIOUS

PDF

35.1 KB Created: 2021-07-09 11:40:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1b1c334908f14a6404fa120f6686bd8 SHA-1: f2390233e19dc57bfbe5db5009eaf6693ac6c0aa SHA-256: feb3b1cb71028ee01ce02804cf4b3ac321a95664549c4c98e713bd91d3ade4a6
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to websites promising free in-game items and hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to potentially malicious or scam websites.

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-cards-for-free-game-hack
    • http://www.sbairs.com/datas/files/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-legend-of-the-fallen-kingdom-2-rpg-cheats_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-robux-generator-without-verification_GM431946152.pdf
    • http://www.sbairs.com/datas/files/mad-city-cheat-codes-season-2-roblox-website_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-card-hack_GM406889139.pdf
    • http://www.sbairs.com/datas/files/roblox-hack-generator_GM431946152.pdf
    • http://www.sbairs.com/datas/files/games-that-can-be-hacked_GM431946152.pdf
    • http://www.sbairs.com/datas/files/www-roblox-com-robux-hack_GM431946152.pdf
    • http://www.sbairs.com/datas/files/is-minecraft-free-on-mac_GM479516143.pdf
    • http://www.sbairs.com/datas/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://www.sbairs.com/datas/files/how-to-get-free-roebucks_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-executor-free-download_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-cheat-tower-deffense_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://www.sbairs.com/datas/files/roblox-free-robux-website_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-hack-scripts-pastebin_GM431946152.pdf
    • http://www.sbairs.com/datas/files/roblox-scam_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-robux-codes-not-used_GM431946152.pdf
    • http://www.sbairs.com/datas/files/code-for-free-robux-2021_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-roblox-accounts-with-obc_GM431946152.pdf
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.html
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032de.bin
e4f3cd5a86a3edd3b461d8b0f311761408a8d553efd4a3bc0345674a89c9a5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x32DE 23092 bytes
font_01_sfnt_off000066cb.bin
51a6fa1d0322029b9e2ca075150f5a08b3c54d54cadd2367ada3da490e26397a
pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 18172 bytes