Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfd22f596e069a8a…

MALICIOUS

PDF

367.6 KB Created: 2015-08-24 00:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: fc629d3c980e88247f2d9207dc4dc2a3 SHA-1: cbbf59469dfb2b1cf2bdd8fbd35131809bbf111e SHA-256: dfd22f596e069a8a3927acd8b7d4d20360df3fb5dad0f0615a2f806760608ba2
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. The document body is heavily obfuscated and appears to contain garbled text, but the presence of the malicious URL is the primary indicator of malicious intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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+%D0%B8%D0%B3%D1%80%D1%8B+%D0%BD%D0%B0+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD+nokia+bl-4u&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4692/4692992_pasportnaya__baza__dannuye_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693429_skachat__flesh__pleer_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693797_koduy__vuychetov__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000573b6.bin
9db2da9252ccc8d45cdb30f8d815b50ec208d50b2eec207b464d405ee5b967b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573B6 9976 bytes
font_01_sfnt_off00059007.bin
9a6db76ec417c857541c41f7a7e300e5cf1d3ce427331d1a43197ede6a465ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59007 15184 bytes

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