Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef025edb49235757…

MALICIOUS

PDF

365.8 KB Created: 2015-08-25 22:11:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 39ff6b6ca0ece50fdeedb4f67584ef81 SHA-1: 149bb0b6c77ada943c8a4cbf0ac76a72fd6d7b2c SHA-256: ef025edb49235757292ea59efa8bb973168c23ffc01406af774ba3a13cc392b7
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 infrastructure, 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 malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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=gta+san+andreas+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%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/7//4740/4740552_skachat__minecraft__multi_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740637_uplay_overlay_show_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740590_liya__kirgetova__nichya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056ba4.bin
b1a362c0ffec29527c81043b0ee5525f7322e56c8a7f98716d0efbd3ee1d1ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BA4 8944 bytes
font_01_sfnt_off00058515.bin
ea9330ba359260bcb6b6235dd8ecc4d8844213a28820878937fa01f9cf6361b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58515 17016 bytes

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