Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6fa20fd876149a…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 08:52:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b4bb009231b833cd2b903cac0bc52114 SHA-1: d96573ad3b3a39d5f7da631bb61f4270209e0843 SHA-256: 8b6fa20fd876149afd1bf34619570f16b441f7f40ab6504077e43abfaeb30d38
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which are presented as links to game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm designed to attract users seeking illicit game modifications. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is intended to distribute malware or lead users to malicious 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/roblox-lumber-tycoon-2-money-hack-deutsch-game-hack
    • http://lib.smklabor.sch.id/repository/ast-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/veichle-simulator-roblox-hack_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/hacks-for-dungeon-quest-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-gift-card-giveaway-live_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-2021-robux-free-no-download-2021_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-live_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdf
    • http://lib.smklabor.sch.id/repository/free-pet-treats-coin-master_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/husky-roblox-obby-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-link-today_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/hacking-roblox-accounts-real-way-2021_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-vip-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/can-u-get-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-apps-that-work_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/hacks-for-booga-booga-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-easy-and-fast_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-roblox-clothes-codes_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-working-robux-generator-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e39.bin
d844eb356e33d78b3399c026448a7ffb5bb0edddd2f98fcf5787088ba07da8ea
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E39 21852 bytes
font_01_sfnt_off00005e85.bin
6cbd03e4e0779fbbe2466178644da5a45833e9b77079e07ecde083a525607ffe
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E85 19996 bytes