Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bc22ead2cac460a…

MALICIOUS

PDF

356.0 KB Created: 2015-08-28 16:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: caa69f8c2efd0c822dffb366babba513 SHA-1: a6d3670e1cb4ab068c32228334131c753fe2b42b SHA-256: 8bc22ead2cac460ac5ac508609945a8ff4373fa3f71f11c2573d257c906dc3d2
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted from this sample, and the document body was unreadable, but the presence of the malicious link is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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%84%D0%BE%D1%80%D0%BC%D0%B0+%D0%BC-29+%D0%BE%D1%82%D1%87%D0%B5%D1%82+%D0%BE+%D1%80%D0%B0%D1%81%D1%85%D0%BE%D0%B4%D0%B5+%D0%BC%D0%B0%D1%82%D0%B5%D1%80%D0%B8%D0%B0%D0%BB%D0%BE%D0%B2+%D0%B2+%D1%81%D1%82%D1%80%D0%BE%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D1%81%D1%82%D0%B2%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4804/4804584_igruy__dlya__sony_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4805/4805647_skachat__hlds__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4805/4805607_kak__sostavit__smetu_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054789.bin
f681555a4d073a78d99e2e9426714690ab57c61df166911ed66634c46ecb40b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54789 8484 bytes
font_01_sfnt_off00056091.bin
6121de5bc216d7a64b0d7e4bbf94ec905066875985f17ed78bc2f6d0cc2b4a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56091 16052 bytes

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