Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5228d594b0bc136…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 11:19:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b8ad4f8c6b387272478e548b13d00c4a SHA-1: aed44ea0c91c87a833e8935f1f9b63a3c1f36b0b SHA-256: c5228d594b0bc1367d021982020d8f0b679599a21c5b75638990b10e0ec7b181
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are SEO-optimized PDFs promising free in-game items or currency for popular games. The ML classifier and the presence of a download button heuristic strongly indicate malicious intent. The primary URL http://netcdn.co/app/431946152/roblox-free-gamepasse-script-2021-game-hack likely hosts a malicious script intended to be downloaded by the user.

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/roblox-free-gamepasse-script-2021-game-hack
    • https://fib.ub.ac.id/sac/repository/extaf-live-roblox-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-back-if-i-was-hacked-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-rush-com-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-inspect_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-email-rewards-link_GM406889139.pdf
    • https://fib.ub.ac.id/sac//repository/free-roblox-accounts-that-work_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-games-working_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-free-and-easy_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-hack-download_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-download-or-survey-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-hack-robux-pastebin-octubre-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-2021_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-vip-server-roblox-mad-city_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/como-hackear-el-pin-de-una-cuenta-de-roblox_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/hacks-to-get-free-robux_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-premium-roblox_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-play-for-free-without-downloading_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/roblox-project-pokemon-exp-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dba.bin
01d335ad23157a7d665ffba944d42d2dee44ea24710861e53944e2f7ede50b80
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBA 22060 bytes
font_01_sfnt_off00005eb4.bin
34cb86877c2f5a6e2c4198396defff084be24448076d0d5794c9117022fe813e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB4 19712 bytes