Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3256009b08bc3aa…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 03:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 83c3a87cadc8301d575891ed5ede8022 SHA-1: 795f3c9cd5615929fb7ce129cd5f345fa0a00c71 SHA-256: d3256009b08bc3aa48b379a360def82febe0c3aba3c534e33bb5057c3e909197
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are part of a link farm designed to appear as search engine results for game cheats and hacks. The primary URL http://netcdn.co/app/431946152/best-free-robux-hack-game-hack likely serves as a lure to download a malicious payload. The ML classifier strongly indicated maliciousness, and the presence of a "download button" lure further supports a malicious intent.

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/best-free-robux-hack-game-hack
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-on-pc-with-cheat-engine_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdf
    • https://perpustakaan.itda.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/roblox-the-island-2-cheats_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/50-free-spins-coin-master-links_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/free-roblox-code-generator_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-download-ios_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-that-actually-works_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdf
    • https://perpustakaan.itda.ac.id/repository/free-roblox-commands_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/roblox-arcane-adventures-v4-hack_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/hack-to-hack-roblox_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/como-hackear-una-cuenta-de-roblox-facil-y-rapido_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-100-spin-link_GM406889139.pdf
    • https://perpustakaan.itda.ac.id/repository/free-robux-2021_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/op-rewards-free-robux_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/roblox-get-every-gamepass-free_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/hack-roblox-system48-free_GM431946152.pdf
    • https://perpustakaan.itda.ac.id/repository/link-for-free-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec9.bin
43477d367b0618d82d7e3a67c4a62ad8162a51b0762c731d53e6556a664f0a56
pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC9 22600 bytes
font_01_sfnt_off00006164.bin
e598598f023a9463e481cf89e68b52bbff3a1808a07260d051f3c87ddc0d52c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 18992 bytes