Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab7a244e5f973ae…

MALICIOUS

PDF

346.9 KB Created: 2015-08-28 11:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a3698e7caa89f0b1539fd50fa6ae0c35 SHA-1: 70289ba11237b249ae6007a3fc0c596ab78d08c2 SHA-256: 1ab7a244e5f973ae17622c6cfd77f68c7b90c86244523bdd9c6b67ffeb56f0a6
98 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The embedded JavaScript and malicious redirector suggest the file is designed to lead the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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+%D1%80%D0%B5%D0%BF+%D0%BC%D0%B8%D0%BD%D1%83%D1%81+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802505_diktant__po__russkomu_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802372_skachat__igru__kak_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802522_prohozhdenie__igruy__omerta_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051fd2.bin
c37e086ea55bc74c761550c8e46cd7b891569084a2364b9926f0d437ac9943e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51FD2 8212 bytes
font_01_sfnt_off0005375d.bin
52f9914dd929fb88464f7d274a360e1b37c66fdad2f72f89e2318e95d2bcb2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5375D 17696 bytes

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