Malicious PDF — malware analysis report

Static analysis result for SHA-256 426a357b003dff8d…

MALICIOUS

PDF

42.7 KB Created: 2021-05-21 05:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c2e1c479be2aab687f8327fe7d3fdecd SHA-1: 6599a64b4ad1926626554ea1c89263145d4b9969 SHA-256: 426a357b003dff8d2ca9e7d1c1028cb3ffb8a7b2eeb0c424b27a319e15018644
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for "free Robux" and a "Roblox generator" which directs users to a malicious URL. The embedded URL is flagged as malicious redirector infrastructure, and the ML classifier also identified the PDF as malicious. The document body text and embedded URLs suggest a phishing attempt to trick users into visiting a site that likely hosts further malware or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8090

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 https://netcdn.xyz/app/431946152/robuxmatch.com-free-robux-game-hack In PDF document text
    • https://photographygroupofbunbury.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://photographygroupofbunbury.com/images/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000035cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35CB 30676 bytes
SHA-256: 0801c01a0212173a550f831039e89add05de980c6b46092e4fd5f9c804b6c754
font_01_sfnt_off00007a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7D 2824 bytes
SHA-256: 94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4
font_02_sfnt_off0000842c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842C 18840 bytes
SHA-256: 5c4f625c96edef5f8da70d27324c4adb1887d0c0038b5237fb9b16f25e0c59c0

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