Malicious PDF — malware analysis report

Static analysis result for SHA-256 110369a5a10fa7b4…

MALICIOUS

PDF

346.1 KB Created: 2015-08-20 07:40:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ab60cdf3b6758f526bbea9073b0c3058 SHA-1: eda4dcd162a3205e058712fbb3494988333a6f6a SHA-256: 110369a5a10fa7b412940c9577307d8032ab096b0b4dfefcb5e41c4aa5645e41
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, strongly suggests malicious intent. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to infer an attack pattern focused on redirecting the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=50+%D0%BE%D1%82%D1%82%D0%B5%D0%BD%D0%BA%D0%BE%D0%B2+%D1%81%D0%B5%D1%80%D0%BE%D0%B3%D0%BE+%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%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+txt&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638799_1s_8x_unipatch_exe_x64_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638963_telefonnuyy_spravochnik_lunineckogo_rayona.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639120_skachat_vatsap_dlya_nokia_206.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000520b8.bin
2a3b023605c02dc8686fa9287642dac0bd4cf8352033d8999f67ab72a400a67a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x520B8 7916 bytes
font_01_sfnt_off000537ec.bin
768d43b6fc3b20c255c54bb0e925066383973b69c3ac84476bbcd334c75723d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x537EC 16168 bytes

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