Malicious PDF — malware analysis report

Static analysis result for SHA-256 de6e0893420bf0bc…

MALICIOUS

PDF

37.3 KB Created: 2021-05-20 18:57:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7511c032fc18fff9393381ad88531b3b SHA-1: bd463fd1e461040169d27fa7577d0c8e6cb0ff75 SHA-256: de6e0893420bf0bc0d77cf0ad1e2a58f390ed885ed2aaebc6d92ae3c919dc90d
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick users into clicking a link, likely to download a payload or visit a malicious site. The embedded URLs point to resources promising free items for games like Roblox, a common lure for social engineering attacks. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/how-to-get-free-roblox-items-game-hack
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-group-payouts_GM431946152.pdf
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-tiktok-likes-app_GM835599320.pdf
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdf
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://bpkad.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033ca.bin
604700e27da6d9e82f52d02fed07d83c2764cfd49444936d9bde1b7f09eddd2a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33CA 25948 bytes
font_01_sfnt_off00006fe0.bin
8f186cfffdac824b8af051e9c3258ff2c6bc2a624daaf9438b2e2390608ff8bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE0 18476 bytes

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