Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca622ad1867046c0…

MALICIOUS

PDF

36.7 KB Created: 2021-05-12 15:01:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3edabe0f56284dc0e23ad6e12e0a9311 SHA-1: b2d9b773220c497e958e268729eb5fd082a3fdd9 SHA-256: ca622ad1867046c013571d8ae1d250fbe46f014932c54cc65276fef27a4afc2c
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a clear call-to-action and a link to a known malicious redirector, disguised as a download for a game hack. The embedded URL is designed to lead the user to potentially malicious content. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious redirector is in use.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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/coin-master-3.5-13-hack-download-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_off00003454.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3454 25188 bytes
SHA-256: 4455d627a1ddb3caf7d787cdb162e8292d2a50967bcfa788c91a287ef7ddc681
font_01_sfnt_off00006c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6D 18776 bytes
SHA-256: 580191f9d67cac0e57befe9d9f36e9aa4ec96fc89a456a262982ca34f80561e7

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