Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4726c3f88841ac…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 17:42:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 042c94bec668f18365c491dcd21fdc2e SHA-1: ac88b67c8c588e24ddd25f571a1f934d84debda9 SHA-256: 5d4726c3f88841ac69506199d99c561e1f5bf5ca31a7b587472860c19f2c73ad
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that mimics a download lure for game-related hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users. The primary URL, http://netcdn.co/app/431946152/food-empire-roblox-hack-game-hack, likely serves as a download host for a secondary payload.

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/food-empire-roblox-hack-game-hack
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-roblox-clothes-pants_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/minecraft-net-free_GM479516143.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-haktuts_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/appsmob-coin-master-hack_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-free-faces-catalog_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/free-robux-no-verification-required_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/moonactive-free-spins-coin-master_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/coinmaster-free-cards_GM406889139.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/roblox-hack-me-robux_GM431946152.pdf
    • https://www.aeroplanemarket.com/uploaded_files/userfiles/files/how-do-u-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000313e.bin
51de9b381d6f4d8cfce2508f01f67841f960e6f4d26c975ce8510e2b0a855a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x313E 22444 bytes
font_01_sfnt_off00006344.bin
c10970c49af74ee9eb894a73cb1b21700c21f1f31ac1009b07e9b6fdafb075d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6344 19548 bytes

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