Malicious PDF — malware analysis report

Static analysis result for SHA-256 629cc4220e7889d4…

MALICIOUS

PDF

362.9 KB Created: 2015-08-28 00:27:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 7953fa7628ed55297ecdedc40b37c1a8 SHA-1: 7911d6c380b4113fb497e9a33f28c210a95cb9fe SHA-256: 629cc4220e7889d466390ebee1510a55b39729bb40700e0344f931644ff335b0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 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 strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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%B0%D0%B2%D1%82%D0%BE%D0%B1%D1%83%D1%81+%D1%81%D0%B0%D0%BD%D0%BA%D1%82-%D0%BF%D0%B5%D1%82%D0%B5%D1%80%D0%B1%D1%83%D1%80%D0%B3+%D0%BF%D1%81%D0%BA%D0%BE%D0%B2+%D1%80%D0%B0%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788788_shema__dozimetra__na_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788055_shablonuy__blagodarstvennuyh__pisem_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787811_skachat__mod__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056539.bin
72d912636b013ebeb806839c3465e0b8532a9255c25f0e62a4d43384974e1863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56539 7864 bytes
font_01_sfnt_off00057c5b.bin
728a2ff9d6f7bbd109b9cd650f3a72e97da24bdeffdf0711058da60e08844f40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C5B 15036 bytes

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