Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f4849bb9dcd391…

MALICIOUS

PDF

50.6 KB Created: 2021-05-16 05:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: aec66baef360591bef244cc620eb2e85 SHA-1: 91d1062bdb3710dd095b6416d11fbba8afdd97ab SHA-256: b8f4849bb9dcd391b30b77b01a1865c00e77bd8dad702cb053a343d6b103282c
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded text and a link that mimics a game hack download, directing users to the URL 'https://netcdn.xyz/app/406889139/coin-master-hack-3.5.5-game-hack'. This URL is flagged as malicious, indicating a likely phishing or malware distribution attempt. The presence of a visual download button further supports the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0145

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-hack-3.5.5-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F0 32420 bytes
SHA-256: efa0d7eef15b057ee4747d3d2da50ea991c1b6b9e2215d1d3c446d1a1970fd08
font_01_sfnt_off00007887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7887 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00008352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8352 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off00009677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9677 18088 bytes
SHA-256: 13ec477abf113127a618fa5d81506a62133832003edcea60c7bf1f0e56d0719f
font_04_sfnt_off0000b7fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FE 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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