Malicious PDF — malware analysis report

Static analysis result for SHA-256 136d67006d7b3e30…

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 12:43:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a7f34f19b08a1bf44c0a9584de362195 SHA-1: 79677606b13bdc1db55b81ecbee2e51e1488e506 SHA-256: 136d67006d7b3e304357dc960ca2e4c936010eadf04b61c4aba451ab048937c3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a document body that promotes 'Roblox hacks' and 'free Robux', indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm with 28 external links further supports a malicious intent, likely to redirect users to exploit kits or malware download sites. 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.co/app/431946152/fre-shavacado-song-compilation-roblox-id-game-hack
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-cheat-engine-how-to-get-robux_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-hack-free-robux-2021_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-roblox-hacks-no-survey_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-get-a-free-dragon-adopt-me-roblox_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-cat-hacked_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/como-hackear-los-robux_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/how-to-get-free-robux-no-points_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-hack-no-survey-no-password-no-download_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-robux-advertisement_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/buy-roblox-for-free_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-coin-coin-master_GM406889139.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/tiktok-like-bot-free_GM835599320.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-hack-in-to-notleah-roblox-acount_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/websites-to-get-free-robux_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/obby-gives-you-free-robux-no-password_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-roblox-2021-accounts_GM431946152.pdf
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-minecraft-account_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc6.bin
d5bfb69379f3e8152c654833da1e547e71503e2e0a5eaa69fc02651bcfadc94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC6 22388 bytes
font_01_sfnt_off00006141.bin
65a750ee6f4a8bc95647939a8b44b57a40cfd031399a4493d7856dbfec9d817c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 19764 bytes

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