Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5cc5522d1b38605…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 16:18:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 05f5d079cae23a1cd2aff112577b9d62 SHA-1: 7f135f338c7a591a54e455e0d47b78ff3d97a667 SHA-256: d5cc5522d1b38605c43271c771a90866d0af83d27e0d99e1372cb0a209563b7a
82 Risk Score

Malware Insights

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

The document presents a lure for free Robux, instructing the user to install a browser extension or update. This aligns with a social engineering tactic to trick users into compromising their systems. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely to download a second-stage payload or steal credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.online/app/431946152/how-to-hack-roblox-to-get-free-robux-game-hack
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/robux-in_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/spinuri-gratis-coin-master_GM406889139.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/roblox-re_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-app-2021_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-roblox-items_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-apk-mod-coin-master_GM406889139.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/minecraft-mods-download-free_GM479516143.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/mega-cheat-download-in-roblox_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-roblox-accessories_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-roblox-clothes-for-your-avatar_GM431946152.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-to-play-minecraft-servers_GM479516143.pdf
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a5.bin
4d7b918fd4cfaf92895a428f75a2a12c6e4cc11526d5f52780f2a7c5e6666995		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A5 26608 bytes
font_01_sfnt_off00008cb6.bin
a768fd9037f2962d7d468f6b0310abba3890de72b41426d235b5de2790bab1ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 18756 bytes

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