Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fd71ac4fe77b61c…

MALICIOUS

PDF

42.5 KB Created: 2021-05-14 08:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3581bd584e8b8ed1e6d5aac2bd3be4cc SHA-1: 75f24d0b4353f909a949460f0094e69495c2cf54 SHA-256: 3fd71ac4fe77b61cfa264f20e21b7d0760acb7728dc86cbad985daf42a83b17d
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing indicating a malicious redirector link. The document body and embedded artifacts suggest a lure related to 'Coin Master' free spins, aiming to trick users into clicking the malicious URL. While no scripts were directly extracted, the PDF structure and the presence of a malicious redirector imply an attempt to download or redirect the user to a malicious payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/406889139/haktuts.in-2021-09-coin-master-50-free-spin-and-coin-link.html-m-1-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_off00003641.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3641 28104 bytes
SHA-256: 3d7a606ca92b69a3867f6be310115df1b527af9b91bd0e30aa64b56370ca1131
font_01_sfnt_off00007770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7770 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8121 19504 bytes
SHA-256: 7faa6dfb3d694d90b26991393cee8819b968e3c6541be97391070d01954e6158

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