Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0486b1cabfc51ff…

MALICIOUS

PDF

48.7 KB Created: 2021-05-11 23:40:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 95e4e9604334ee74f5961d5a03dabab4 SHA-1: 1979d43e60eab9ab094a26d16415e3f0e2cfb73a SHA-256: b0486b1cabfc51ff2073f057f97e5404ac51ce5178eda1fb0605fb758e84a46f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to pages promising hacks or free in-game currency for popular games like Roblox and Coin Master. The document body and extracted URLs suggest a lure to trick users into visiting malicious websites, likely for phishing or to download further malware. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

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.xyz/app/431946152/how-to-gift-robux-on-mobile-game-hack
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/hack-coin-master-without-root_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-can-i-get-free-robux_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-facebook_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/where-to-get-free-robux_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/bit-ly-coin-master-hack_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-get-robux_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/roblox-install-free_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/roblox-robux-generator-tool_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/20-free-spins-coin-master_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-minecraft-mods-for-ps4_GM479516143.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/free-robux-glitch-2021_GM431946152.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/coin-master-rewards-app_GM406889139.pdf
    • https://elearning.min1kebumen.sch.id/__statics/gudangsoal/files/coin-master-free-spins-ios-app_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c1e.bin
7cc3b05791b259f2484cbaa1e7f0dd47395cab2088c8a0dc2910b62b2ae6584f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C1E 29116 bytes
font_01_sfnt_off00008e79.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E79 5696 bytes
font_02_sfnt_off00009b8b.bin
4e4801ff192b8e14fd7533e10dce0a67112ed0a3683ce7dd9491cafead6d393b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8B 18508 bytes

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