Malicious PDF — malware analysis report

Static analysis result for SHA-256 22909952d77ba6fa…

MALICIOUS

PDF

51.8 KB Created: 2021-05-13 07:33:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 041e7badf28241c7166c91e268edf553 SHA-1: c053b55136fb0f12546ac2c3d004df13785f709f SHA-256: 22909952d77ba6fa8cd62a3cfb4c7a12fde3c7d664b8c262b4ab40191da5a71c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure for game cheats, indicating a phishing or social engineering attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's designed to redirect users to malicious content. The document body, though heavily obfuscated, contains references to hacking and game exploits, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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.xyz/app/431946152/how-to-hack-a-roblox-account-2021-game-hack PDF link annotation
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-app-free-download_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://ce.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a6c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6C 42220 bytes
SHA-256: 4f6edc1f9612746749fb58f557a4f6747c4b07727edbce9e6bae0b2ca39808b0
font_01_sfnt_off0000a67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67D 18992 bytes
SHA-256: aeef6a7714c6357f73dd4bac3524810632f54ab1d1528492d13c90d39421ba58

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