Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c37b9a3c34d04e…

MALICIOUS

PDF

345.0 KB Created: 2015-08-26 00:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-06-17
MD5: 7bb696d9c9c4893da4b7bd3cdde7ef93 SHA-1: 1a1cd13bb1627fa35f49ba2dc4ade8ad0b7f6de7 SHA-256: 53c37b9a3c34d04e6516fb30abf681c2047841eace83a93406c887eb322bf00b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded link suggest a malicious intent to redirect the user to external content.

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%BD%D0%BE%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B0%D1%80%D0%BE%D0%B4%D0%BD%D0%BE%D0%B3%D0%BE+%D0%BE%D1%80%D0%BA%D0%B5%D1%81%D1%82%D1%80%D0%B0&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4742/4742957_skachat__chituy__na_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741107_skachat__programmu__game_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741610_skachat__prilozhenie__vkontakte_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051e16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51E16 8160 bytes
SHA-256: 6a84c5687e5a6e0ecb5389872f6b006fbacfa578e2f4b2508c53f8fb777e8153
font_01_sfnt_off00053560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53560 14996 bytes
SHA-256: e45caab8e1d08204b2e794667f14c7c119a36172c4e04d2d953452035ba40107

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