Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf425bd759e532f2…

MALICIOUS

PDF

350.0 KB Created: 2015-08-19 15:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-02
MD5: efefe79fe2602d345df7426cbfcfc1c0 SHA-1: 8d18b41c0cb3fbcb942a7b429ac097b5baddbb4a SHA-256: cf425bd759e532f2d608d0412d4b477071c075044aa12537823099efafd6771f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings suggest the document is designed to lure users to a malicious site.

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%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D1%8B+%D0%B2%D0%B8%D0%B7%D0%B8%D1%82%D0%BE%D0%BA+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B4%D0%BB%D1%8F+word&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627462_skachat_chit_na_blokadu_besplatno_i_bez_virusov.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626889_tamara_lisickaya_idiotki_skachat_knigu.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626757_inkoterms_2015_kratkoe_soderzhanie.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000531af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x531AF 8772 bytes
SHA-256: 97c9d0b36c957637470906948d0a5a91c7d377d38b3926f9e29778d501cc56a6
font_01_sfnt_off00054a8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54A8C 14620 bytes
SHA-256: df42a3d31e34b2e990ddda84c29fc7ca9fac95cb4c2f5228d51dee55249ca08d

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