Malicious PDF — malware analysis report

Static analysis result for SHA-256 273210bac9067e82…

MALICIOUS

PDF

381.8 KB Created: 2015-08-19 20:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e063444d16a5c06770a14ffc45188049 SHA-1: 3fcd36e4c2284a1e602f3793df1007da6fd29499 SHA-256: 273210bac9067e82a3375b6e7492ec58e9a6215400213f56d3ee75723fc94dbd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1071.001 Web Protocols

The PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link and a high ML score. ClamAV also detected it as Pdf.Dropper.Agent-8786108-0. The embedded URL points to botcraftman.ru, which is identified as malicious infrastructure. This suggests the PDF is designed to redirect the user to a site that likely hosts and downloads a second-stage malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8786108-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8786108-0
  • 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%B0%D1%82%D0%BB%D0%B0%D0%BD%D1%82+%D1%80%D0%B0%D1%81%D0%BF%D1%80%D0%B0%D0%B2%D0%B8%D0%BB+%D0%BF%D0%BB%D0%B5%D1%87%D0%B8+%D1%87%D0%B0%D1%81%D1%82%D1%8C+3+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4628/4628922_belaya_kniga_viktor_vasilev_skachat_fb2.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626559_bonus_kod_na_iyun_2015_world_of_tanks.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4629/4629878_kak_pravilno_delat_kuligulus_videourok_besplatno.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005ad64.bin
c16836f3e758fadd25cf5e4292b302deed135ddd47febdc1752cfe53f4ba81f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD64 9348 bytes
font_01_sfnt_off0005c732.bin
912ea081bb13e9968a88f660f9b7a89d520cf0e7649f27819d00ab3be0e77636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C732 15456 bytes

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