Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a99afb9e66cfa1…

MALICIOUS

PDF

34.6 KB Created: 2021-06-20 06:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4065934d16003f233c16720a6f32d90e SHA-1: 4b2ff98508d64a7fb816eb5886a6fef909d0c526 SHA-256: 16a99afb9e66cfa1fc2f85cd5d144d55794843d875861416d6b5ae9c0ba67412
62 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to an IP address, that are related to game hacks and cheats, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious workflow. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/cheated-roblox-gun-game-hack
    • http://122.201.26.170/files/editor/files/roblox-free-robux-codes_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/get-robux-easily-free_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/free-roblox-codd_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/free-hair-roblox-hack_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/minecraft-multiplayer-free_GM479516143.pdf
    • http://122.201.26.170/files/editor/files/regal-world-coin-master_GM406889139.pdf
    • http://122.201.26.170/files/editor/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/free-robux-no-verification-needed_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/coin-master-hack-2021-android_GM406889139.pdf
    • http://122.201.26.170/files/editor/files/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • http://122.201.26.170/files/editor/files/how-to-hack-roblox-jailbreak-on-mac_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://122.201.26.170/files/editor/files/roblox-accounts-free-2021_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://122.201.26.170/files/editor/files/coin-master-cheats-2021_GM406889139.pdf
    • http://122.201.26.170/files/editor/files/how-to-get-free-roblox-hair_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/earn-free-spins-for-coin-master_GM406889139.pdf
    • http://122.201.26.170/files/editor/files/www-roblox-com-free-robux_GM431946152.pdf
    • http://122.201.26.170/files/editor/files/roblox-password-hacker_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003023.bin
71ceb1339071ae2b4a0c0f57ea9cfbaf20d233c80161359b89e23c0999c8b16d
pdf-font-stream PDF embedded font (sfnt) at offset 0x3023 22448 bytes
font_01_sfnt_off00006233.bin
15b6c56f6f5d4f13feda200434c92202a22d93f51306ba1fe3404e3d3a82877b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 19068 bytes