Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd093f37a171bc50…

MALICIOUS

PDF

37.3 KB Created: 2021-05-16 11:40:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 768617b37a364a7b7ea8acf8c6742ea6 SHA-1: cd2e8ae323f391f22109aae553cad45d721aa87a SHA-256: cd093f37a171bc50ae3a52af79625b361f36e99d7c2ac415ab20b75cb9757259
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links and text that strongly suggest a social engineering lure. Specifically, it uses a 'free Robux' theme and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, which is a known tactic to trick users into visiting malicious sites. The heuristic 'SE_BROWSER_INSTALL_LURE' further supports this, indicating the document prompts users to install something. The embedded URL points to known malicious redirector infrastructure, likely serving as the initial stage for malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://netcdn.xyz/app/431946152/uprobux.com-free-robux-game-hack In 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_off000033fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FE 25480 bytes
SHA-256: a244bbf83e7a401ca8553051912b7e5e0697299f77e431f6d6fe509b807eca48
font_01_sfnt_off00006f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 18700 bytes
SHA-256: 143ab518bfe1873128e001b27a68cdab9711d8d723564be581f3f50f35f3a2b6

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