Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cdfe518c56e6b6…

MALICIOUS

PDF

39.7 KB Created: 2021-05-12 07:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f8f207bad409da036b28765954a0df9a SHA-1: ee8c12d2e388ae02685f149e31a970af624e1dbb SHA-256: a5cdfe518c56e6b6a2bfcded01505763ae0d556c09cfa241ab34cd9779438248
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to a suspicious URL that appears to host a game hack client. The document also contains a visual download button lure, suggesting a social engineering attempt to trick the user into downloading a payload. No scripts were extracted, but the presence of a malicious redirector and download lure strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/479516143/wurst-hacked-client-1.12-2-game-hack In 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_003_off00003731.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3731 24584 bytes
SHA-256: cf862594d36d531130fb66802cdb619ceac4caf18074a1cd5f3f46901f679150
font_01_sfnt_off00006eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAE 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000078bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 18620 bytes
SHA-256: 80e22772db7eca57705c0187b86df7abc8931c2a6d79ddee303f8eb1dbbde651

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