Malicious PDF — malware analysis report

Static analysis result for SHA-256 66d4736b6e95d4e5…

MALICIOUS

PDF

371.1 KB Created: 2015-08-29 04:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9a0ff5cbfa4cfa7834b77949175aff7c SHA-1: ccaf1170b9b2d6ab31e0d24b2e7002cf8ff45cb7 SHA-256: 66d4736b6e95d4e53ecc7cbdb8e6dcbf8916dbce5a980cb85bc187202e739d23
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and contains a link to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is likely used to direct users to a malicious website. No scripts were extracted, but the presence of a malicious link suggests an attempt to lure the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%D0%BE+%D0%B1%D0%B5%D0%BB%D0%BE%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+10+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D1%80%D0%B5%D1%88%D0%B5%D0%B1%D0%BD%D0%B8%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818736_dvigatel__perkins__nastroyka_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817499_maksim__kantor__uchebnik_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4819/4819956_tot__esche__karlson_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005876f.bin
ed1b3b14af6c8eccc14becfaf7be25b057c421fa1cd1b6a31746f0a9d0241095		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5876F 9032 bytes
font_01_sfnt_off0005a075.bin
ed146fba4bd2e0fe00c976c1d6e9e7023e622289250243926c09324a09439e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A075 13952 bytes

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