Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb8562be4987102e…

MALICIOUS

PDF

34.1 KB Created: 2021-07-03 14:04:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 59e28c9436c890b56aa388ff0b6c5500 SHA-1: d6f3de1ce1776568974bb8c9646e323ca3a27ebe SHA-256: cb8562be4987102e193dcc000ca2fdd79affe44e906d259df44b800d5bbe3bb6
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are SEO-optimized pages promising game hacks and free currency for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a malicious workflow designed to redirect users to potentially harmful content. No scripts were extracted from this sample.

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/431946152/how-to-get-free-clothing-on-roblox-game-hack
    • https://fib.ub.ac.id/sac/repository/roblox-booga-booga-fly-hack-may-26_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spin-app-apk_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/coin-master-latest-version-hack_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/daily-spins-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-no-survey_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-2021_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/wwwfreerobuxgenoratercom_GM431946152.pdf
    • https://fib.ub.ac.id/sac//repository/minecraft-free-download-no-virus_GM479516143.pdf
    • https://fib.ub.ac.id/sac//repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • https://fib.ub.ac.id/sac/repository/skywars-hack-roblox_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/free-robux-codes-to-type-in-chat_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/juego-hackeado-de-coin-master_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/hack-coin-master-apk-32-download_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-no-phone-number_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/run-free-roblox-id_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/blogger-free-spins-and-coins_GM406889139.pdf
    • https://fib.ub.ac.id/sac/repository/feb-23-2021-free-coin-master-spins_GM406889139.pdf
    • https://fib.ub.ac.id/sac//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • https://fib.ub.ac.id/sac/repository/how-to-hack-in-a-roblox-account-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e0d.bin
9b828549380567649c100ecadaafb0b355a650a06d4d8130d96af444eb2787db
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0D 22316 bytes
font_01_sfnt_off00005f9e.bin
0aba831274a1df0def1544f89fab620d44c9887148e03fc9b07b92578835405e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 19204 bytes