Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef5b7a345c7f490…

MALICIOUS

PDF

347.2 KB Created: 2015-08-26 10:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 851559e31726123c7cf0c38f7a20785f SHA-1: 2b36f593530cc7b19e5375e56df692c2bae7d60d SHA-256: 5ef5b7a345c7f4904890b140bdd2efea7cf3c4a03745fec57d8bc10a2132df48
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristic firings suggest a phishing or malware delivery attempt.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%84%D0%B8%D0%BB%D1%8C%D0%BC+%D0%BD%D0%B5+%D0%BE%D1%82%D1%80%D0%B5%D0%BA%D0%B0%D1%8E%D1%82%D1%81%D1%8F+%D0%BB%D1%8E%D0%B1%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752475_skachat__call__of_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751570_pushkin__zimnyaya__doroga_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751903_skachat__korotkiy__lyubovnuyy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000520b5.bin
80dcedffe9e16d31995b250b7d9da623f4b91639e1615166319775f21da7f708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520B5 9484 bytes
font_01_sfnt_off00053bef.bin
40766261fb6724c293dc297b1381c8b403ef12f21764f4c26ff06fe44a8c6937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BEF 16472 bytes

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