Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b0df2d2f0cf9b4…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 11:30:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d2e93c6e9837af644b7f6f0369a84244 SHA-1: 6bd1226b5d38e3416794a6744538b33b446e6e68 SHA-256: d1b0df2d2f0cf9b4f8d35a90ae37fcf39d08d53c49fefbdfe27c36c2cae66bfc
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents. These links, such as 'https://netcdn.xyz/app/431946152/free-robux-no-verification-game-hack', are designed to lure users with promises of free game currency. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to distribute malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-no-verification-game-hack
    • https://fud.iain-surakarta.ac.id/pustaka/repository/unlimited-robux-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-roblox-website_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/8bp-hack-coin-master_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-hack-coin-master-computer_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/twitter-coin-master-free-spins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-online-games-like-minecraft_GM479516143.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/real-coin-master-free-spins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-glitch-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/best-minecraft-hacked-client_GM479516143.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-hacker-club_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-robux-gift-card-codes-2021_GM431946152.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/free-attacks-on-coin-master_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/coin-master-game-hack_GM406889139.pdf
    • https://fud.iain-surakarta.ac.id/pustaka/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad9.bin
76afe406f160e431c74580d855a3b6c6a89bbc5906facc917870e6a48c500d9a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD9 25264 bytes
font_01_sfnt_off000084c5.bin
361892a278de990f6dfe9fe9f512a0ec39aeba1740037781b92f32c6ad2b5051		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C5 18600 bytes

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