Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6c27c43663ecf2…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 00:37:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 24f7a584b002e5ea35b45b505f983b96 SHA-1: d13b06f0194261090129d3279860ea820265e2e4 SHA-256: de6c27c43663ecf20b4398a11f27bf60a2c76b036c861841e168264d902e7cf9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was generated by wkhtmltopdf and contains numerous embedded URLs, forming a link farm. The document body and extracted URLs explicitly mention 'free Robux' and game hacks, indicating a lure to potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external links suggests an attempt to redirect users to a second-stage payload or phishing site.

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-hack-no-verification-game-hack
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/500-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-hack-everything-in-roblox_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-app_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/robux-com-roblox_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/100-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-free-download_GM479516143.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-no-password_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-please_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/free-private-minecraft-server_GM479516143.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-hack-shinobi-life-roblox_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-free-robux-by-roblox_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/roblox-jailbreak-inf-money-hack-youtube_GM431946152.pdf
    • https://elearning.mtsn1pringsewu.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032ff.bin
7fe5f3f6d0e94112ee623338e030d0a0d0f6956a085df86a6b41de7d3be91632		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32FF 21960 bytes
font_01_sfnt_off0000637a.bin
96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x637A 19244 bytes

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