Malicious PDF — malware analysis report

Static analysis result for SHA-256 adc4a2c850f1a494…

MALICIOUS

PDF

370.7 KB Created: 2015-08-19 17:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 22eccabb2191bf1b8c6ca14a4a3488f0 SHA-1: dfaac012d9323cec538ef9a69fe5f2dec59b0f87 SHA-256: adc4a2c850f1a494dbed1ee587da7fcdbaf171cee3b8a7d4687a592d56e2054e
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL 'http://botcraftman.ru/?lip&keyword=%D0%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+sm+%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D0%BB%D0%B5%D1%80+%D1%88%D0%B8%D0%BD%D1%8B+%D0%BD%D0%B0+lenovo+b590&charset=utf-8' is the primary indicator of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+sm+%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D0%BB%D0%B5%D1%80+%D1%88%D0%B8%D0%BD%D1%8B+%D0%BD%D0%B0+lenovo+b590&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4627/4627502_sims_4_skachat_torrent_russkaya_versiya_bez_oridzhinal.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4628/4628081_vo_vse_tyazhkie_1_sezon_skachat_torrent_lostfilm.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4628/4628069_realnuye_zadaniya_egye_2015_po_matematike.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005870a.bin
ffb5dd58813b8c0192e323fa102c20c9e794767c347dfdf3a863d8e15d5e4282		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5870A 8588 bytes
font_01_sfnt_off00059f35.bin
f36bf9143509cdcc09433b0e886f470b6209a142ea63d5fcee728502423e62c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F35 13736 bytes

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