Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba687565cbe5f56…

MALICIOUS

PDF

41.8 KB Created: 2021-04-29 03:22:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 8111808d9d8ae694329020363e563d77 SHA-1: dd200dfe258bd960f2f82b70d609190cf89e0812 SHA-256: 9ba687565cbe5f56b33c034ad7211666e4623931c8df1c12fcc28ec676331147
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple lures, including invisible links and a visual download button, directing users to external websites. One prominent link leads to a CAPTCHA-themed page, suggesting an attempt to bypass security measures or trick users into completing tasks. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent, likely to deliver further malware or engage in phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • 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/wow-to-hack-roblox-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-use-cheat-engine-on-roblox-2021-august.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-no-captcha.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-password-finder-hack.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/visenya-roblox-free-download.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-project-pokemon-cheat-engine.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-rich-roblox-passwords.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-reatai-tycoon-hack.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/best-free-girls-roblox-outfits.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-use-cheat-engine-without-roblox-shutting-down.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/roblox-spawn-in-models-hack.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_off00004662.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4662 26436 bytes
SHA-256: eaf67712a1a255093e3d71f087d5b1b0e29adfe7e05736a467de0cd8771b4623
font_01_sfnt_off000080a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A4 18544 bytes
SHA-256: 532c6bde92f3afe37c0f552a043004ca05c61bd80b3a2551f6d7f79e914b4881

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