Malicious PDF — malware analysis report

Static analysis result for SHA-256 b669bd8592ca0ae8…

MALICIOUS

PDF

45.9 KB Created: 2021-06-11 01:56:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fcbd9deac1db6e0b965ca1e5be8fc954 SHA-1: 35ec8c3b46bdeea39e0732276471d9e2a3730832 SHA-256: b669bd8592ca0ae87662ba116f4222a4693e3f5604bc6733f94d1e7cd94ffde3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual lure suggesting a download. The ML classifier strongly indicates maliciousness, and the presence of multiple links to external resources, some related to game hacks and exploits, suggests a phishing or malware distribution attempt. The document body, though partially corrupted, contains a URL that likely leads to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/how-to-trade-for-free-on-roblox-game-hack
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-link-app_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/descargar-coin-master-hackeado_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-codes-not-clickbait_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-daily-spin-free_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/wurst-commands_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hacks-no-downloading_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-change-roblox-name-for-free_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/are-there-ways-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-win-free-robux_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-no-verification-or-survey-2021-pc_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-deals_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-tool-hack_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/minecraft-bedrock-free-download-pc_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-coins_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-roblox-scripts_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-coins-coin-master_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-hack-2021-free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054f6.bin
8b6d102071ffdf4c13b33c86091a39c906f66ae8d821308648ecb16b4b4c5f85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F6 25340 bytes
font_01_sfnt_off0000901d.bin
4f0998ce808ec1fd19848173b84bd2b82aff663db20f3dfefed229eba0297888		 pdf-font-stream PDF embedded font (sfnt) at offset 0x901D 18516 bytes

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