Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3a12b6ca20bae4…

MALICIOUS

PDF

357.6 KB Created: 2015-08-19 15:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-24
MD5: 516b934cd5d50c384df70ec58929e912 SHA-1: 06ec3ee78fe3cfd106cd37bd1f62cf6aa82e867b SHA-256: fb3a12b6ca20bae4c2e22d804ee76ada0c3b9c3b9c3c1241e4cc0017df1a3be0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and unreadable, but the presence of a malicious redirector strongly suggests a phishing or malware distribution 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=%D0%B4%D0%BE%D0%BB%D0%B3+%D1%80%D0%B0%D0%BD%D0%BC%D0%B0%D1%80%D0%BD%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+fb2&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626676_bosch_classixx_4_instrukciya.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4496/4496753_kibersantinvestor_skachat_torrent.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627021_sochinenie_po_literature_v_11_klasse_v_2015_godu_primer.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F25 8248 bytes
SHA-256: 8c71a1fc7ac249fafc2bb6874b4fb40c2f9f44d0045aa28b71174e079cfc3a90
font_01_sfnt_off00056787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56787 15828 bytes
SHA-256: e3598e3c70c7ac0c9efa09fa729bfc3cf858c5e79edf9182483a9ef0003a324d

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