Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d286e1d5e18d86…

MALICIOUS

PDF

354.0 KB Created: 2015-08-28 11:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 00a8a3332ed0dd643e2e345942c79adf SHA-1: 857e1486d7f016df188e303316b6baeee671be55 SHA-256: 58d286e1d5e18d86bf6c33f8abe4bb59680342a2d7f53101bcf0dd681c96c266
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 2

  • 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.
  • 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 http://botcraftman.ru/?lip&keyword=%D0%BA%D0%BE%D0%B4+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8+autodesk&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802404_skachat__posledniy__patch_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802408_flash__player___.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802448_winzip__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053719.bin
9a83ec808ffd7d7ef14dc16a3028123f099366c9ef124874f7d59f74dcf33dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53719 9736 bytes
font_01_sfnt_off000552b1.bin
29788b6c1d784872836cd90ed41000f0e47753efa5d8855b0488babcbff205c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552B1 18004 bytes

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