Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa56927d976af9e5…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 19:46:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9f0e6d3a0185dc20466efd31b2cf7d99 SHA-1: 6b3836d3802b8d4dec639bc3c044d6e491b7b3db SHA-256: fa56927d976af9e52c51378c8f0fd7352218b2fc4669bb66cb722c53bea7ebad
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be part of a link farm designed to attract users with keywords related to free game items and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized PDF links suggests an attempt to drive traffic to potentially harmful sites. The document body, though partially corrupted, contains a URL that aligns with the overall theme of exploiting game-related keywords.

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/how-to-get-a-headless-on-roblox-for-free-game-hack
    • http://perpustakaan.stietenggarong.ac.id/repository/free-coin-master-spin-app_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-code-on-how-to-get-clothes-for-free_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/does-coin-master-hack-work_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/robux-download_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-get-1m-robux-free-everyday_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-hack-robux-into-your-account_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-roblox-high-school-game_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-script-hack_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-adopt-me-money-hack-2021_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-2021-july_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/how-to-call-roblox-for-hacked-account_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/como-hackear-robux-en-roblox-2021-facil-y-rapido_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-robux-meme_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/free-unlimited-robux_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/roblox-com-get-robux-for-free_GM431946152.pdf
    • http://perpustakaan.stietenggarong.ac.id/repository/money-cheats-in-roblox-bloxburb-beta_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033c2.bin
f88284c37391321cfa563f1bca26470f1fa1d16dca1061c2734594c6fff33e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C2 21656 bytes
font_01_sfnt_off00006369.bin
55c71e745855851d3fb79e74fb54293f8df2ab691531f3ed7c8b61cb831b4059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6369 19092 bytes

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