Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3a42b4e682d1ec…

MALICIOUS

PDF

38.3 KB Created: 2021-05-20 23:56:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7fa3550d35ae8e947a0e453c48516015 SHA-1: 55ad3cfc6b4f5f5c71c8def661c23d340ffa06db SHA-256: ce3a42b4e682d1ecdd8f9b0dba9400fbb6f80d73bb53825bc00f9dd751670ac2
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, a common social engineering tactic to deceive users into interacting with malicious content. It also embeds multiple URLs, one of which is directly associated with a 'roblox-report-hacker-game-hack' theme, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7010

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/431946152/roblox-report-hacker-game-hack
    • https://flyingchalks.com/ckfinder/userfiles/files/download-hack-coin-master_GM406889139.pdf
    • https://flyingchalks.com/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
    • https://flyingchalks.com/ckfinder/userfiles/files/rbx-free_GM431946152.pdf
    • https://flyingchalks.com/ckfinder/userfiles/files/free-robux-meme_GM431946152.pdf
    • https://flyingchalks.com/ckfinder/userfiles/files/roblox-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002fca.bin
05b5c15f3efb2a2c301f96abe8c00e29f9c77b3442f49828e8e1c56cc91cf60b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCA 24260 bytes
font_01_sfnt_off0000667a.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x667A 5596 bytes
font_02_sfnt_off00007321.bin
79c09b5b6208491040c3b62148bcc9153cd4a1890769045a69a367cda9837255		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 18464 bytes

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