Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d68b4bf8b2bcfa…

MALICIOUS

PDF

349.1 KB Created: 2015-08-20 07:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 191d81887c88198243db068c8d3da9d5 SHA-1: 33dc4b20e850d75780f6d0c009702df5a05fc160 SHA-256: a9d68b4bf8b2bcfafcbea9e05c9d8163ddcd3933644a2f701dbb2d9a23ab9b05
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is associated with malicious redirects. No scripts were extracted, and the document body was unreadable, but the presence of the malicious link is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D1%86%D0%B2%D0%B5%D1%82%D0%BE%D0%BA+%D0%B4%D0%BB%D1%8F+%D0%B3%D0%BB%D0%B0%D0%B7+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&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//4638/4638876_skachat_koran_na_arabskom_tekst.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638914_vitaliy_zuykov_naemnik_ego_velichestva_skachat_fb2.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052b3e.bin
2c5b5c333a5bc9b86d51b8e6ab07274c4a83571c23294f28629cd0e585c1908c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B3E 7920 bytes
font_01_sfnt_off000541ca.bin
5bb9206cb61876f7a40545e96fd1af01c1036e5185ac414a0890a7a1ab19f4be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x541CA 17228 bytes

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