Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43315370f73a2f6…

MALICIOUS

PDF

351.8 KB Created: 2015-08-28 11:35:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 38f83ecc289221440eecd0d370ffc4a3 SHA-1: db871bf2f992eedb47ffd1325218475233f00772 SHA-256: b43315370f73a2f62914dd804fdb42fb6085fedc2b3a63af89e842257c717fbf
90 Risk Score

Malware Insights

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

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 does not provide clear textual clues, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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%BA%D0%BB%D1%8E%D1%87+win7+%D0%BF%D1%80%D0%BE%D1%84%D0%B5%D1%81%D1%81%D0%B8%D0%BE%D0%BD%D0%B0%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F+32&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802466_dogovor__kupliprodazhi__tovara_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802450_instrukciya__po__upravleniyu_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802389_skachat__yemulyator__android_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005341b.bin
c8502580f45bae8c0b037aee6736a77292e93fd5fe50063a66b19d4410cd9d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5341B 9720 bytes
font_01_sfnt_off00055058.bin
9a82adce2a685aced0483578ccdddf4717ead2d9d0a901d519ff89b86d3921cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55058 15232 bytes

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