Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbea42c76bc7be5…

MALICIOUS

PDF

36.4 KB Created: 2021-06-27 11:42:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c80698282620478b692e3d64d62c29e SHA-1: 7cbdb6a167288651a03c6970bf3f02725c24b0ed SHA-256: 9fbea42c76bc7be52dff4f979d753d84ef9b857df705146020127e9e98917f7f
102 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs and a document body that mimics a download page for game cheats and hacks, specifically targeting Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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-phantom-forces-pepsis-aimbot-hack-2021-game-hack
    • http://lib.smklabor.sch.id/repository/roblox-play-free-online-no-download_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-4_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-no-tasks_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/hack-coin-master-link_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-november-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-roblox-ctrl-s_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-no-verification-or-survey-100-real_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/roblox-free-no-sign-up_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/hoew-to-fly-in-roblox-free_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/all-cool-free-shirts-in-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/why-wont-cheat-engine-work-on-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-hack-online-link_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/i-want-free-robux_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-gift-links-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/is-pokemon-go-free-on-ios_GM1094591345.pdf
    • http://lib.smklabor.sch.id/repository/free-minecraft-alt-accounts_GM479516143.pdf
    • http://lib.smklabor.sch.id/repository/best-free-exploit-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334d.bin
3a01033729425ceb5f41b5b3ae20ad909d679f41503ccc94d1e7cf31b28a1b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x334D 22684 bytes
font_01_sfnt_off00006641.bin
f85c6e205bc93298b46481da1ba97772d61054a3fd19def3162079819c7b3fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 20204 bytes

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