Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b336e116cf85a68…

MALICIOUS

PDF

362.6 KB Created: 2015-08-20 09:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d7bd33ff5989bec0a2e7fcf55cd64780 SHA-1: d78483d0af37f5ef4d695e7438e7920bf4f4797c SHA-256: 1b336e116cf85a68b2010e7921c272e15b286dda9cec0221fdb452a7055feecd
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, botcraftman.ru. This indicates an attempt to lure the user to a malicious site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%81%D0%BB%D0%B0%D0%B4%D0%BA%D0%B0%D1%8F+%D0%B6%D0%B8%D0%B7%D0%BD%D1%8C+%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&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639876_primer_chek_lista_audita.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639919_kod_aktivacii_dlya_crystal_tv.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639414_skachat_garis_mod_10_s_modami_cherez_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056634.bin
da8841cff8e491bdbb9653c8c56c2d0486395e9911bae68aa6cfe766f4576dbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56634 7440 bytes
font_01_sfnt_off00057bf3.bin
16e6e9ffc5baffae7ee8fe18f77dcbb0cb2ec583a58dda105afda28aef0350dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57BF3 15320 bytes

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