Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d4d212e1fd9c191…

MALICIOUS

PDF

47.4 KB Created: 2021-06-09 03:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 83f070e438e6859c93bc4e32ce8f4357 SHA-1: abf2a0e33d347d06a9d3496962ee51f790100cf2 SHA-256: 4d4d212e1fd9c191a4dca71fa7754d0007bee9f8ac8d5636e0bfabab99d31096
102 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized and point to game-related content, suggesting a lure to download malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a malicious intent. No scripts were extracted, but the overall structure and link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.tw/app/431946152/roblox-bloxburg-cheat-engine-game-hack
    • https://perpustakaan.iahntp.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdf
    • https://perpustakaan.iahntp.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-hack-ios-app_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-coins-coin-master-link_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.iahntp.ac.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-hack-us_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-hacks-for-roblox-work_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/pubg-300-uc-free_GM1330123889.pdf
    • http://perpustakaan.iahntp.ac.id/repository/flip-master-free-coins_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-daily-free-spins-25_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-account_GM406889139.pdf
    • https://perpustakaan.iahntp.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdf
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdf
    • http://perpustakaan.iahntp.ac.id/repository/original-roblox_GM431946152.pdf
    • http://wolfzscripts
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050df.bin
d19b5314060be0d178c305538d0fb10072b0a6c5467a35e2407143e266d87bc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DF 25116 bytes
font_01_sfnt_off00008b4f.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4F 2832 bytes
font_02_sfnt_off00009500.bin
29c2d41e60e2e64edec25b89910aa13856f735a5adaadd48228fa6c29237337d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9500 18832 bytes

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