Malicious PDF — malware analysis report

Static analysis result for SHA-256 708d5a66f4e7a3d3…

MALICIOUS

PDF

366.1 KB Created: 2015-08-23 20:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 30e66e67d9e0428d700da1fa4c7bf296 SHA-1: 62f3dd75db8e8ca22d7f3602782b98deb806fc0a SHA-256: 708d5a66f4e7a3d33c46c4b9d2d39f5c297ee2563e9dc9d41b365b0ab5f555b0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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%94%D0%B8%D0%B7%D0%B0%D0%B9%D0%BD+%D0%BA%D0%B2%D0%B0%D1%80%D1%82%D0%B8%D1%80+%D1%81%D1%82%D1%83%D0%B4%D0%B8%D0%B9+%D1%84%D0%BE%D1%82%D0%BE+25+%D0%BA%D0%B2+%D0%BC&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690004_pourochnuye__razrabotki__po_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4688/4688411_luykova__izobrazitelnaya__deyatelnost_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4687/4687123_skachat__windows__7_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057303.bin
0acde728364bd3b58609d9557459208c2929f29f9ff303e272a1716b58f95da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57303 7644 bytes
font_01_sfnt_off00058940.bin
5665f5e93b1c64ea1f111df9277bcfd44dac797321d30e495122e179f2cdeda2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58940 15116 bytes

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