Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62e3cb4e3726e3a…

MALICIOUS

PDF

357.8 KB Created: 2015-08-19 12:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 190e8333d411f189036855b538f3ece2 SHA-1: da0e25ef3d980cb04bf9ba77cfd59a5a867b725a SHA-256: e62e3cb4e3726e3a41d2894b9a8e2b4e6b29af1f122b9c8b5c2f459a4b7f28d4
110 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The ML classifier also flagged this PDF with high confidence. The document body appears to be malformed or heavily obfuscated, but the presence of a malicious URL is the primary indicator of compromise. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.
  • PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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=Zulayho+boyhonova+abduhoshim+ismoilov+lift+video&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4496/4496729_skachat_gotovuye_intro_dlya_sony_vegas_pro_12.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4496/4496723_pl_sql_developer_samouchitel.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055d6d.bin
270070083885cbb6925cda22210a563cd326bbebaa203c1ae56b45bcf2a55f4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D6D 9640 bytes
font_01_sfnt_off00057794.bin
bb83456b38f97e8e2a193fc853ba6b2c3b081e8c3dd1383159dfa5e81104a9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57794 10308 bytes

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