Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3334655ec45db5…

MALICIOUS

PDF

352.2 KB Created: 2015-08-20 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c053bfe083b28e73e051ff1698bb3171 SHA-1: a142af2f6f7a99f72117c49b944dc4ad9c334971 SHA-256: ff3334655ec45db5717b287ab77c41194e61674e1cad70e445a3f0560ae86c31
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 strongly flagged this PDF as malicious. The document body is heavily obfuscated and appears to be junk data, providing no further context on the lure.

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=unigraphics+nx+8+rus+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640304_link2sd_plus_skachat_russkuyu_versiyu_na_android.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639627_skachat_mod_na_maynkraft_164_na_mashinuy_i_garazh.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638932_skinuy_dlya_maynkraft_1_5_2_po_nikam.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005325c.bin
60dfc54640df94a2cfa67c2f0014878556445b04d5b2c62bdce432824dc96151		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5325C 9772 bytes
font_01_sfnt_off00054ce6.bin
82f104d3b3e3bd2b535345462ae9097a30557ef1b79652a0e074f44682f35cfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CE6 17300 bytes

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