Malicious PDF — malware analysis report

Static analysis result for SHA-256 521ede515af9011d…

MALICIOUS

PDF

354.5 KB Created: 2015-08-29 11:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 6e3659660d2717c34fe6e54e1b9aa032 SHA-1: 5dc6e2ffe321614548b6aa90d6541997cd5be5c1 SHA-256: 521ede515af9011d6cff1b2cb556fa5ed30255d81fb05677847c5d68e4d73d8c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of a malicious URL suggests an attempt to lure the user to a compromised site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%B2%D1%8B%D0%BA%D1%80%D0%BE%D0%B9%D0%BA%D0%B8+%D0%BF%D0%B0%D0%BB%D1%8C%D1%82%D0%BE+%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&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829954_testuy__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829983_activesync_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829929_simulyator__vozhdeniya__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005449d.bin
8f82b7f80f02a1f63b2c77fc06e6bcab68c4d2f6fe8cb627bea8d077db4d16fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5449D 8240 bytes
font_01_sfnt_off00055c4b.bin
b24fcc1ed1b8ddfdf7029cef35b7287d8c43df78150f094ccfc983ff64506f69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55C4B 14940 bytes

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