Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1839a643271b20…

MALICIOUS

PDF

386.8 KB Created: 2015-08-20 07:43:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-10-31
MD5: 69b275a12523cfc1b7cccc50fa8aa214 SHA-1: 96f33cb50103d333b0b21d8da8b6b8afe65a9901 SHA-256: 1b1839a643271b201a9ecc300035f33b42a64f3d531c9d4e463abe6c2a66df6d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This heuristic firing, combined with the ML classifier's high confidence, indicates the document's primary purpose is to lure the user to a malicious site. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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%BC%D0%BE%D1%82%D1%80%D0%B5%D1%82%D1%8C+%D1%84%D0%B8%D0%BB%D1%8C%D0%BC+%D0%BC%D0%BE%D0%BD%D0%B0%D1%81%D1%82%D1%8B%D1%80%D1%81%D0%BA%D0%B8%D0%B5+%D1%81%D0%BE%D0%B1%D0%BB%D0%B0%D0%B7%D0%BD%D1%8B+1979&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639138_kak_aktivirovat_windows_81_professionalnaya_build_9600_navsegda.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638886_sportivnuye_privetstviya_komand_v_stihah.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639013_skachat_live_cd_windows_xp_dlya_fleshki.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005b956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B956 10808 bytes
SHA-256: 05dc423bd4e2c2078793e5ce84e9d784ed5692a1ca5c038ce3071b28dedbf6bf
font_01_sfnt_off0005d756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D756 17344 bytes
SHA-256: 61701a0111c28dbb47b0cfe5f17d7c5c6e32f065310affa354902d328a7686e2

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