Malicious PDF — malware analysis report

Static analysis result for SHA-256 38929ac7df3fcab4…

MALICIOUS

PDF

359.4 KB Created: 2015-08-19 12:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1b21f02480a77021f84c1d387e357288 SHA-1: 2520f494a27a51c3fee03d182fc7ca5958134219 SHA-256: 38929ac7df3fcab498ade31487a4756e8ee3a2334ee8fdacf2124504c0a39948
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the PDF is designed to lure users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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-8736441-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8736441-0
  • 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=%D1%81%D0%BA%D0%B0%D0%B9%D0%BF+%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%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%8F%D0%B7%D1%8B%D0%BA%D0%B5+%D0%BD%D0%BE%D0%B2%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626456_skachat_key_root_master_na_android.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4496/4496724_skachat_videopad_video_editor_241_rusifikator.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4496/4496735_yekskursii_v_adlere_cenuy.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055420.bin
b7fc37c8fbdfea8542c0e1fc1984f2bf97927f4e7f7d60a2919c57bcfd47a7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55420 9020 bytes
font_01_sfnt_off00056e6e.bin
c9916ea68087a21b926b8a095e94327357c8c123a88f1634962e6d1fc6eacc85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56E6E 15668 bytes

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