Malicious PDF — malware analysis report

Static analysis result for SHA-256 489a11eb75a791f6…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 07:05:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2297ebd880c1832f9958e8eab0d6e6a SHA-1: 9d5dc815c27b064bd82aeef1e8b2a7a09dc5f0b4 SHA-256: 489a11eb75a791f68b7206f6fa7a1b9fb8add6a7010a09e734b176a3176784b7
82 Risk Score

Malware Insights

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

The document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a lure to download a malicious payload. The heuristic for a password-protected archive handoff indicates that the downloaded content may be encrypted to evade initial security checks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-hack-2021-game-hack
    • http://gts.edu.gh/library/repository/how-to-get-22-500-robux-for-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-ios-2021_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-robux-inspect-pastebin_GM431946152.pdf
    • http://gts.edu.gh/library/repository/coin-master-hack-2021-free_GM406889139.pdf
    • http://gts.edu.gh/library/repository/flip-master-coins-hack_GM406889139.pdf
    • http://gts.edu.gh/library/repository/kazok-how-to-hack-roblox-accounts_GM431946152.pdf
    • http://gts.edu.gh/library/repository/cheat-codes-for-assassin-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-coins-and-spins_GM406889139.pdf
    • http://gts.edu.gh/library/repository/minecraft-bedrock-free-download_GM479516143.pdf
    • http://gts.edu.gh/library/repository/who-to-get-free-shadow-item-pack-free-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/is-free-robux-real_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-coin-link-for-coin-master_GM406889139.pdf
    • http://gts.edu.gh/library/repository/roblox-but_GM431946152.pdf
    • http://gts.edu.gh/library/repository/hacked-roblox-game_GM431946152.pdf
    • http://gts.edu.gh/library/repository/item-for-free-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://gts.edu.gh/library/repository/free-coins-coin-master-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fee.bin
59180c4ccfb6e4d59365a2a94411d054bca5d2fa38856e56b2c8ef99cd1b7c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEE 22304 bytes
font_01_sfnt_off00006176.bin
98be41374c31724b7a878275a9dc475d7e9908887f4f5935c763b7161266aa61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6176 19056 bytes

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