Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a354f18f4083d0e…

MALICIOUS

PDF

36.9 KB Created: 2021-07-03 13:48:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 01d858aedefc6d3826eba40732b231ce SHA-1: 6a3161d451e9b773d15a393b3508e57069ffdb10 SHA-256: 4a354f18f4083d0ea0b140daa1ae9a2e352b4b146c337a10ea45dd3760d5f647
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are SEO-optimized and promise free in-game currency or hacks for popular games like Robux and Coin Master. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful sites. The document's content and structure strongly suggest a phishing or scam attempt.

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/how-to-get-free-robux-by-playing-games-game-hack
    • http://miperwanida.me/__statics/gudangsoal/files/spin-free-coin-master_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/robux-best_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-naruto-final-bond-hack_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spons-apk-2021_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-roblox-games-for-free_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-hack-tool-no-human-verification_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/can-i-have-robux_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-with-no-verification-2021_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-how-to-get-free-dominus-2021_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-the-streets-hack-on-xbox_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-its-free-music-id_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/free-scripts-roblox_GM431946152.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/get-free-spins-in-coin-master_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-kicked-by-server-cheat-engine_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035d5.bin
ca9ecff79581abceee7016e2199b30faf86b16d9922cfcbfa9667c95ead66f4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35D5 22992 bytes
font_01_sfnt_off00006981.bin
9e977a5575cc9b35e2b14531736cd30bfd9bd13fa3776d4baf53e95f9fc8fb94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6981 19772 bytes

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