Malicious PDF — malware analysis report

Static analysis result for SHA-256 b21975471a00f3bd…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 15:22:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: abd00b2584f61b52f92e8a5774ba753d SHA-1: 4f8c4e5d309dc2eccf4a3ecd79d16c926df6710b SHA-256: b21975471a00f3bdc5dbfc58bde7c7fce64f396ac83221f8844ae20e77da2c36
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related hacks and cheats. The primary URL, http://netcdn.co/app/431946152/free-vip-server-roblox-pet-simulator-game-hack, likely serves as a download or redirect to a malicious payload. The heuristic PDF_SEO_LINK_FARM indicates a mass of such links, suggesting a link farm or spamming operation designed to attract users searching for cheats.

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-vip-server-roblox-pet-simulator-game-hack
    • https://fib.ub.ac.id/sac/repository/hack-robux-2021-inspect-element_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-hacks-and-cheats_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-link_GM406889139.pdf
    • https://fib.ub.ac.id/sac//repository/how-you-get-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/free-robux-codes-not-used_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/coin-master-mod-free-download_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-without-verification_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/easy-free-spins-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/noclip-hacks-for-roblox-arsenal-of-free_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-minecraft-skins_GM479516143.pdf
    • https://fib.ub.ac.id/sac/repository/8bp-hack-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-km_GM1094591345.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • https://fib.ub.ac.id/sac//repository/minecraft-java-free-download_GM479516143.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-tool-v1-9_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-2021-march_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-free-cookie-list_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-giveaway-live-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-2021-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e1c.bin
204815a18c288a1c9d8d69cf57ef9f93cc72d968a810327ed50cb81b78b50199
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1C 22364 bytes
font_01_sfnt_off00005fc3.bin
0863696818bdc45fc97802df4e847e5f94299274f32a0f4e0d17619c437d8f2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC3 19852 bytes