Malicious PDF — malware analysis report

Static analysis result for SHA-256 014d8a69b1092952…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 07:50:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8dd4091ad502d753a8896b835925a09e SHA-1: e901c743fa68a5517caf62a61fa9bbb9503d9209 SHA-256: 014d8a69b10929521203d9fbd1c5819628150c43d1e7c2dbbc38d54dd2952e55
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and text that mimic a 'Robux' generator for Roblox, a common lure for malicious content. The primary link directs to 'netcdn.tw', identified as malicious redirector infrastructure. A secondary link points to 'clinicamanila.com', which also hosts a PDF that may be part of the same malicious chain. The document's structure and content suggest it's designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0907

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/roblox36.com-free-robux-game-hack In PDF document text
    • http://clinicamanila.com/ckfinder/userfiles/files/minecraft-on-computer-free_GM479516143.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
font_00_sfnt_off00002724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2724 23268 bytes
SHA-256: 48fbbe8c183809883a9ed8dac0c3c54e65491bcc3940cb90651e81d7b9be37dc
font_01_sfnt_off00005b84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B84 18940 bytes
SHA-256: f32316c3924b123291bec9797e338b19bc01463e7838b8a228eaa1e4eeb0d8f0

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