Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f0fd30912e004f…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 18:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 80f8796a64d8b35aaa71d4448de6e689 SHA-1: 6abf4b809a85d99910051100bfa6237c59b5081e SHA-256: a3f0fd30912e004fad18c75c4bf89e56a478e719bcde90ddf9c3a2f25913b44b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on domains related to game hacks and free in-game currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these external links, suggesting a malicious intent to direct users to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs strongly suggest a lure for users seeking free Robux or game cheats, which is a common tactic for phishing or malware distribution.

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.tw/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-get-roblox-account-back-if-hacked_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/minecraft-alt-accounts-free_GM479516143.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-hack-online-cheat_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-free-phantom-forces-vip-server_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-get-the-ninja-animation-in-roblox-for-free_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/best-free-software-to-make-thumbnails-on-roblox_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-no-survey-roblox-rubox-generator_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/cheat-engine-and-roblox_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/daily-coin-master-free-spins_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-hack-any-game-on-roblox_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/get-free-robux-gg_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-free-robux-com_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/80-free-spins-coin-master_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/robux-no-human-verification_GM431946152.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://stmik-kharisma.ac.id/perpustakaan/repository/pubg-uc-gift-card_GM1330123889.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f75.bin
40430b6b425d8469f3869733c1198515c35a2c789b061a66208efa239e1e5b7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F75 22620 bytes
font_01_sfnt_off00006215.bin
da7d406aba47eea6317da3ede96973437af681d442b83efbb40dfbc95f86b21f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 20184 bytes

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