Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca05f190d08d1dec…

MALICIOUS

PDF

35.3 KB Created: 2021-06-27 15:55:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 784557e8e0d500ee9dfb266b7e8a2695 SHA-1: 6e734e2d15f18bd9c5253b35b3108146c4b76430 SHA-256: ca05f190d08d1decf861b7605818092d42ec0ac87b87cdcacd73b67540db26e9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes 'free Robux' and game hacks, indicating a lure for users. The heuristic PDF_SEO_LINK_FARM firing suggests a large number of external links were generated, likely to create a link farm for SEO purposes, which is a common tactic for distributing malicious content or phishing pages. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

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/comment-faire-marcher-synapse-hack-roblox-game-hack
    • https://library.iuli.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-to-get-free-skin-in-roblox-2021_GM431946152.pdf
    • https://library.iuli.ac.id/repository/robux-for-offers_GM431946152.pdf
    • https://library.iuli.ac.id/repository/roblox-moderators_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdf
    • https://library.iuli.ac.id/repository/wix-site-free-robux_GM431946152.pdf
    • https://library.iuli.ac.id/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdf
    • https://library.iuli.ac.id/repository/roblox-cheat-robux_GM431946152.pdf
    • https://library.iuli.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdf
    • https://library.iuli.ac.id/repository/roblox-when-will-bloxburg-be-free_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-to-get-free-coins-in-assassin-roblox-2021_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-to-get-free-gift-cards-roblox_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-robux-games-that-work-2021_GM431946152.pdf
    • https://library.iuli.ac.id/repository/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • https://library.iuli.ac.id/repository/how-to-get-free-robux-2021-no-surver_GM431946152.pdf
    • https://library.iuli.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdf
    • https://library.iuli.ac.id/repository/robux-giver-for-free_GM431946152.pdf
    • https://library.iuli.ac.id/repository/how-dt-oget-free-robux-and-free-catilog_GM431946152.pdf
    • https://library.iuli.ac.id/repository/roblox-bloxburg-free-gamepass_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e6.bin
2d33f4cb020fb0bcfa14d7cf271810d8892714659a0d90479a8e0d0054503b40
pdf-font-stream PDF embedded font (sfnt) at offset 0x31E6 21920 bytes
font_01_sfnt_off00006275.bin
1f3529985a8f1a67064c29e5f96e41a530a21a8aafaecec2ffc2ea3e5739cd4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6275 20024 bytes