Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d0d0df2c212ff1…

MALICIOUS

PDF

46.4 KB Created: 2021-05-19 06:33:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 463567d19bd577640de5a40a10d39fdd SHA-1: 1d833310e79baae9d634c200000a234081b9b5a1 SHA-256: 65d0d0df2c212ff1db4f9a4371df53260fef9bc0352daa4dbc097d2a173b50d0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to pages offering "free Robux" or "free coins," suggesting a phishing or scam lure. The heuristic PDF_SEO_LINK_FARM indicates a large number of such links, and the ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the content point towards an attempt to redirect users to malicious sites, likely for credential harvesting or other fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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-get-free-robux-without-verification-2021-game-hack
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/free-coin-master-account_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-2021_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-with-no-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/pokemon-go-free-coins-no-human-verification_GM1094591345.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/get-free-robux-no-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/minecraft-free-download-linux_GM479516143.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/rbx-free-robux_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ce0.bin
c25e58b67e75c6970936d9b8f83e8c807745247e6ab0ebfb89d68f44e1322742		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CE0 28800 bytes
font_01_sfnt_off00008f5e.bin
1b346556c7df455cb9a54b8f1a6e3f1a0bfffa2d9228fa0640c35d2bdb9db684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5E 19528 bytes

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