Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2bdbfdc4876885…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 21:43:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b46fa744456a0e49fbe610f7c1f1cc2d SHA-1: 199ab0a241f99805df669edda8f4278743aab624 SHA-256: 4c2bdbfdc4876885486e3d2cbd38d37796bec9336d02c9924a749033390120d0
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are SEO-optimized pages related to game hacks and 'free Robux'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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.tw/app/431946152/free-robux-pastebin-game-hack
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-generator-for-roblx_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-hats-roblox-girls_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/get-me-free-robux_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/red-boy-hack-roblox-descargar_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-hack-apk_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-no-apps_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-hack-that-really-really-actually-works_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-roblox-http-catchsatoshi-online-robux-roblox_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/coin-master-freebies-2021_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/cheat-roblox-jailbreak-2021-money-free_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-hack-the-underground-in-roblox_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/how-to-get-free-bloxburg-in-roblox_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdf
    • https://www.trendsfashionusa.com/uploaded_files/userfiles/files/code-cheat-roblox-to-chat_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003081.bin
364e8994aa81598a314c2affd651a509a49ef218b9e0977b14a9e95bfea63b06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3081 22592 bytes
font_01_sfnt_off000062e4.bin
5bfd890d84b0c14d72a786ae590b650f833002b15fe449ee91ced07c3ea68d33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 19092 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.