Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4cd482071ec40ea…

MALICIOUS

PDF

346.6 KB Created: 2015-08-26 03:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-06-13
MD5: 3cb33c18ce899d99bd246cf39b779a31 SHA-1: 585e50c17a4c6ebb11bcd01f4a9b21a124e8e8ff SHA-256: e4cd482071ec40eaff1b2b285d8b5210dc27aa43c02bb4ae2719dba3e0ec19cb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is http://botcraftman.ru/. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lure the user to a harmful site, likely for phishing or to download a secondary payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%A1%D0%BD%D1%8F%D1%82%D1%8C+%D0%B7%D0%B0%D1%89%D0%B8%D1%82%D1%83+infoprotector&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4743/4743468_olimpiadnuye__zadaniya__po_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741727_kak__skachat__vatsap_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4746/4746711_drayvera__pixus__play_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000528fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x528FD 8404 bytes
SHA-256: 373783ad30f83a41123c5b1929750228c594287298cd47d6ff0fb3129a530524
font_01_sfnt_off000540ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540CA 14092 bytes
SHA-256: 0b17984f62f5e8ccba5f312508fede4aad4d02a7d81a23ed0ca94083a63dbf76

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