Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee71ca72519faac7…

MALICIOUS

PDF

351.0 KB Created: 2015-08-26 13:51:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: cfad301ed7414a62c4e92bdc6e5afbc4 SHA-1: 874829246214662dc812a074623683838de8b68b SHA-256: ee71ca72519faac7e89801fd200c069f44cc8008d29e450b6e9ed548067621b3
90 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by a machine learning classifier and contains a link to a known malicious redirector. The embedded URL http://botcraftman.ru/?lip&keyword=%D0%BA%D0%BE%D0%B4%D1%8B+%D0%BE%D1%88%D0%B8%D0%B1%D0%BE%D0%BA+%D0%BF%D0%B5%D0%B6%D0%BE+206&charset=utf-8 is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, limiting further analysis of execution chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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%BA%D0%BE%D0%B4%D1%8B+%D0%BE%D1%88%D0%B8%D0%B1%D0%BE%D0%BA+%D0%BF%D0%B5%D0%B6%D0%BE+206&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753348_upravlenie__organizacionnuymi__izmeneniyami_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4756/4756196_plaginuy__dlya__soni_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4755/4755346_skachat__igru__papinuy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053be1.bin
a776b8b78e699b696507e6b626f9792440cc6b9af1f662277bc9db722b7c2f53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BE1 7684 bytes
font_01_sfnt_off00055234.bin
97ed51f63f39a163967749841251232f65f656a3f9726e3e7db3fe7b499b5963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55234 13308 bytes

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