Malicious PDF — malware analysis report

Static analysis result for SHA-256 de74cbba0cc7287d…

MALICIOUS

PDF

34.6 KB Created: 2021-06-17 16:16:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7fc3409e311223b604a63e6eed3351b6 SHA-1: fd4aebff0013d221f1b2e0fe4219c8f941044266 SHA-256: de74cbba0cc7287d5f2c69375c834d8b5ff9781072ddae35a275f28649d3c7e3
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes 'free' in-game items for popular games, acting as a lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, suggesting a link farm designed to drive traffic to potentially malicious sites. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document, likely intended to trick users into downloading malware or visiting phishing sites.

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-free-group-on-roblox-2021-game-hack
    • http://perpus.polbitrada.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/gift-cards-free-roblox-march-2021_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-xyz-download_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/free-coin-master-hacks_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/hack-coin-master-no-verification_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/free-robux-master_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/free-roblox-hair-girl_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/unpatchable-robux-hack-code_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/roblox-hack-com_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/download-hack-roblox-lumber-tycoon-2_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/get-free-coins-on-coin-master_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/coin-master-haktuts_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdf
    • http://perpus.polbitrada.ac.id/repository/i-want-robux_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/free-robux-2021-eazy-no-pastebin_GM431946152.pdf
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ef6.bin
4db1b27b9a8511ff2e8d7afd29a83d1725ea56eb11faa6f4c93f289b5e30a9e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EF6 22148 bytes
font_01_sfnt_off00006035.bin
3158bc369a8f26ef1a6471a35dd5d3d0da38dd617e8d02a2f9db9033844a9315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6035 19636 bytes

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