Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6a74f4d1892796…

MALICIOUS

PDF

383.4 KB Created: 2015-08-24 00:18:52 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 028425bce1e0c645dea56c5005ca1c25 SHA-1: d59270ba326f4b97be4447bbe3d813e1e0ee3de8 SHA-256: 4f6a74f4d18927965e0837e770fb7b123b69327baafa8391cbb93993bfcf2cad
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, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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%BC%D0%B0%D0%B7%D0%B4%D0%B0+6+%D1%80%D1%83%D0%BA%D0%BE%D0%B2%D0%BE%D0%B4%D1%81%D1%82%D0%B2%D0%BE+%D0%BF%D0%BE+%D1%80%D0%B5%D0%BC%D0%BE%D0%BD%D1%82%D1%83+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693843_robert__gyelbreyt__shelkopryad_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693472_adaptivnaya__gimnastika__bubnovskogo_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694147_kimuy__po__matematike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005ba54.bin
d4dae7325ae07f8cc339ee71a2d90aef9388427ac3e24ae54d0d64dc89e61a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA54 8112 bytes
font_01_sfnt_off0005d1a3.bin
7cc63c1ed7c00f97e68c43ea8e9ffb49aa7906b7a0f2c3c6b37a3c7281cc51b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1A3 13884 bytes

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