Malicious PDF — malware analysis report

Static analysis result for SHA-256 719bcdc06fa48a79…

MALICIOUS

PDF

45.0 KB Created: 2021-06-07 13:18:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d75694934927f7ac02abf60731f900f6 SHA-1: 21ac257c5cf6e742639d3a6ab9263350639be5af SHA-256: 719bcdc06fa48a794d4d7f04cb0260c22d081816dfb97bedbe383ab50a28c9b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and lures users with the promise of 'Free Robux', a common tactic for distributing malware. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs suggests the document is designed to redirect users to malicious sites for downloading further payloads, likely exploiting the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/free-robux-for-watcing-game-hack
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-now_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-to-use-redstone_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-printable-roblox-coloring-pages_GM431946152.pdf
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/minecraft-svg-images-free_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/apk-hack-coin-master_GM406889139.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/roblox-robux-generator-no-human-verification_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-2021_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/tiktok-famous-club-free-followers_GM835599320.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-spin-sites-for-coin-master_GM406889139.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-that-work_GM406889139.pdf
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • https://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-trial_GM479516143.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-roblox-accessories_GM431946152.pdf
    • http://elearning.mantemanggung.sch.id/__statics/gudangsoal/files/free-back-accessories-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005112.bin
2ee24b46a382662212cec4c73a86b65756a204febe97aaff821a923ef4d23956		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5112 25196 bytes
font_01_sfnt_off00008b42.bin
e73b20e35e4d9c0c5bf8e96fb35282e956243c303c35073f0cefdeabe5b4e423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B42 18952 bytes

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