Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d63ee08cb7c9668…

MALICIOUS

PDF

34.5 KB Created: 2021-06-23 00:58:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc3bd919da9a19e19576340fecabc631 SHA-1: 09615a56eea0f42f1f6016d3a8d308da1ef01e61 SHA-256: 9d63ee08cb7c9668b415db6acd1357853ae42db9c2ccc1e3e810ff57b6938485
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a 'link farm' structure, strongly suggesting it is designed to redirect users to malicious websites. The document body and extracted URLs focus on 'free game hacks' and 'robux', indicating a lure for potentially unwanted or malicious downloads. 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/free-roblox-dominus-game-hack
    • https://limebug.com/media/storage/editor/files/how-to-hack-point-for-robux-site-for-unlimited-points_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • https://limebug.com/media/storage/editor/files/free-roblox-accounts-that-work_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/roblox-project-lazarus-zombies-hack-script_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/how-to-hack-roblox_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/uirbxclub-roblox-roblox-hack_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/how-do-u-hack-roblox_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/free-robux-accounts-2021_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/how-to-get-bighead-in-roblox-for-free-2021_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/pokemon-go-free-7-km-eggs_GM1094591345.pdf
    • https://limebug.com/media/storage/editor/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • https://limebug.com/media/storage/editor/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdf
    • https://limebug.com/media/storage/editor/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • https://limebug.com/media/storage/editor/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • https://limebug.com/media/storage/editor/files/get-free-roblox_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/free-coin-master-coins-2021_GM406889139.pdf
    • https://limebug.com/media/storage/editor/files/earn-free-robux-today_GM431946152.pdf
    • https://limebug.com/media/storage/editor/files/free-money-roblox-jailbreak_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f16.bin
6a4c20cbbae9bdde7bb5e41215eaac44dcdeb253a9f6d6b3f43997211f403e5b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F16 22484 bytes
font_01_sfnt_off000060ed.bin
59b512dc90008f14457b85b901a0dc6ea5b5041a5824ff86a8869534b615d886
pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 19340 bytes