Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc44b9e4f7f84609…

MALICIOUS

PDF

39.1 KB Created: 2021-05-23 04:21:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bace7f281a5d9c0cbce6e17dfa42f51a SHA-1: b9be914c6ac937d841be038209e96a2a376c05c8 SHA-256: fc44b9e4f7f84609ac82125067090ea6a3698d7ec1496e3b8368551e55d9d62c
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into clicking a link to download "free Tiktok Bots" or similar cheats. The embedded URL and other URLs within the document point to sites offering game hacks and cheats, reinforcing the social engineering aspect. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/835599320/free-tiktok-bots-game-hack
    • https://www.zagorjeadventureteam.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://zagorjeadventureteam.hr/files/roblox-free-roblox_GM431946152.pdf
    • http://zagorjeadventureteam.hr/files/minecraft-world-free-download_GM479516143.pdf
    • http://zagorjeadventureteam.hr/files/robux-hack-me_GM431946152.pdf
    • http://zagorjeadventureteam.hr/files/withdraw-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031b4.bin
a50f4234fd5ee8443f26b3398d50054e95a7447743e0c0cd91972ead057f163c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B4 26852 bytes
font_01_sfnt_off00006f5e.bin
5e0712ca08337fb3b2e5736ec787a8b2ab1b9b6f3706f0b029d23afe08e6a7a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5E 2892 bytes
font_02_sfnt_off00007943.bin
83a0af7587fde9e4cb54786aef6824729efdfe72bd6282daf62b8eaca0103fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 17672 bytes

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