Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca803052be505f6…

MALICIOUS

PDF

352.9 KB Created: 2015-08-28 17:40:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ab801dcaf7a6b9938c4f0a6b9787c5bb SHA-1: c953f782f17e47c9ce3c0cac745bc962af5c7fa6 SHA-256: aca803052be505f6c0e9c001d2cd44bc4c619f5961ea8e9aef0f0dce4d6f867a
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector URL, indicating it is designed to lead users to harmful content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%B0%D0%B2%D1%82%D0%BE%D0%BA%D0%B0%D0%B4+2006+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809282_yelektroshoker__dlya__android_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809328_instrukciya__po__deloproizvodstvu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809113_dogovor__zaloga__kvartiruy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000544c7.bin
550a83d52715343292c287c482125a349f3a6256c6b20d6dbb833dfa60036050		 pdf-font-stream PDF embedded font (sfnt) at offset 0x544C7 7896 bytes
font_01_sfnt_off00055bfe.bin
1f8446ca3e58ce7d09c317e696b12059648db33ef0fcb920e6ccf2ab18ec331d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BFE 12428 bytes

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