Malicious PDF — malware analysis report

Static analysis result for SHA-256 10579a9a68789235…

MALICIOUS

PDF

365.4 KB Created: 2015-08-28 13:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 4452802d776a05d70c648f06fc555712 SHA-1: 2beb1a0238810d6f88ce1735d5844cbfb32f3493 SHA-256: 10579a9a68789235458f21f7c88409bfafb3923691ea9a5a7023fcf6d6b957e7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is associated with malicious activity. The ML classifier also strongly indicated maliciousness. The document body content is largely unreadable, but the presence of the malicious link is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=Form+caption+%D0%BD%D0%B0%D0%BA%D1%80%D1%83%D1%82%D0%B8%D1%82%D1%8C+%D0%B7%D0%BE%D0%BB%D0%BE%D1%82%D0%BE+%D0%B0%D0%B2%D0%B0%D1%82%D0%B0%D1%80%D0%B8%D1%8F&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4803/4803797_skachat__cs__16_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4803/4803231_skachat__programmu__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4804/4804104_goluye__sosedki_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056b77.bin
8ec7cf36e3550ae53b1214cd76e3118dd1b5c139534a4b490ba0d98fd428b850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56B77 9244 bytes
font_01_sfnt_off00058480.bin
5a5c795ff3ca4f57e0892ae54e2ed6e91c331f07cb46d3ef5aaf051c6480ffed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58480 16520 bytes

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