Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1d1a01355423a0…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 08:09:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73737187145df1ec088863374d8efb4f SHA-1: 129305df7a153b9ad3a57debac8693abaeb1ddba SHA-256: 7e1d1a01355423a066d21a4ae7135e401dadeb47bbce61234011d2e901d0d2cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA and a call-to-action button, aiming to trick the user into downloading a payload from the external URL. The document body and embedded URLs suggest a lure related to game cheats or rewards. While no scripts were explicitly extracted, the presence of external URLs and the fake CAPTCHA heuristic strongly indicate a malicious intent to download and execute further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/rbxdemon-game-hack
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/hack-coin-master-pc_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/op-rewards-free-robux_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/haktuts-coin-master_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/roblox-re_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-promo-codes_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/a-lot-of-robux_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-safe_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-roblox-app_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-codes-not-used_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/is-it-possible-to-get-free-robux_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/get-robux-now_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-cheat_GM406889139.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-exe_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdf
    • https://elearning.min5bm.sch.id/__statics/gudangsoal/files/robux-earner_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004940.bin
6cf9cf6697a43904f73f2cdc9b26ab2ff9653c201e9e454a91ab43564920e963		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4940 26824 bytes
font_01_sfnt_off00008711.bin
84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8711 18144 bytes

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