Malicious PDF — malware analysis report

Static analysis result for SHA-256 c799336963f5df10…

MALICIOUS

PDF

358.1 KB Created: 2015-08-25 16:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a80e6abb4da2570dad1bc7e253d82900 SHA-1: 3036a2f2baecaaab3a8674c546f859703c28c814 SHA-256: c799336963f5df1021299fc0a77e75987ea89fcdf573be0247efc7740df9a11e
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, http://botcraftman.ru/. This heuristic firing, combined with a high ML classifier score, indicates a malicious intent to redirect the user to a harmful site. No scripts were extracted from this sample, and the document body was unreadable, but the presence of the malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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%B4%D0%B5%D0%BC%D0%BE%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D0%B3%D0%B8%D0%B0+%D0%BF%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+2015+%D1%84%D0%B8%D0%BF%D0%B8+%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731867_igrat__igruy__besplatno_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731608_star__wars__jedi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4733/4733067_spravka__o__dohodah_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005449e.bin
ffa2b1bbf89560d3ad70623d5865fcbc8ec019c47ee3d4af5d82f5b8f885ab19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5449E 11644 bytes
font_01_sfnt_off00056476.bin
1fa5f244cef8153924a425921af5c1923169ec4f93f85ac9f1047c03db9c7419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56476 17100 bytes

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