Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c552884375685c8…

MALICIOUS

PDF

353.3 KB Created: 2015-08-24 02:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 374925eddcce287e052e37db020fcbf0 SHA-1: 4a1c2ac3fa8fe8b073863f20d162a9c06fa993a8 SHA-256: 8c552884375685c8de8f1390b1006a507b36b583abb07171fe070ff0e4bc37f9
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+airslax+wpawpa2+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8, is the primary indicator of malicious intent. No scripts were extracted, and the document body was heavily truncated and unreadable, preventing further analysis of the delivery mechanism.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+airslax+wpawpa2+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695767_skachat__torrent__heroes_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694357_skachat__besplatno__vatsap_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695614_blank__komandirovochnogo_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005378a.bin
677cf47ca4b1fbeedb89b9813dbcfde0c924c83817fab9295f97d05682dcaa47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5378A 10672 bytes
font_01_sfnt_off00055506.bin
673220b7f988aa0ea503f1c70043da4dd49a8bbc65f8ad3eee866f0c8375c3f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55506 16264 bytes

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