Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b093366fa93f1d…

MALICIOUS

PDF

49.3 KB Created: 2021-06-10 16:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 804f593e5981c81485429f6a53a27e6d SHA-1: a6bd2b3fae959ad6900d6ed3233d20cfc0da5a1c SHA-256: f0b093366fa93f1dc44a17d1ef0349509636f1458684ce64c76407606098855b
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to drive traffic. The document body and heuristics indicate a lure for game-related cheats or currency, and the presence of a clipboard command lure suggests an attempt to trick the user into executing commands. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.tw/app/431946152/hack-de-roblox-admin-game-hack
    • https://ozkara.be/wp-content/uploads/fsqm-files/using-cheat-engine-of-robux_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-in-claim-gg_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-hack-people-easy-on-roblox-web-site_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/roblox-hack-jailbreak-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/flubhack-roblox_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-roblox-sweatshirt_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/how-to-get-free-roblox-on-xbox-one_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/the-streets-roblox-hack_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/roblox-robux-hack-apk-no-human-verification_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-spin-coin-master-2021-link_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/hack-list-for-roblox_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/get-roblox-items-free_GM431946152.pdf
    • https://ozkara.be/wp-content/uploads/fsqm-files/free-robux-now-gg_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f5.bin
d3352e620da1179ab4c5c2ff08421a65ea62776a9f406c3315cb8793e47159f4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F5 28304 bytes
font_01_sfnt_off00009267.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9267 2880 bytes
font_02_sfnt_off00009c52.bin
bf598fed7966f974f29865f76ba425c695b7bf324f79190c1d117dd630f2fb17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C52 18904 bytes

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