Malicious PDF — malware analysis report

Static analysis result for SHA-256 db356a80707ee2b9…

MALICIOUS

PDF

354.1 KB Created: 2015-08-28 11:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e5f9d4b2cdc973ad557f6c27657794bc SHA-1: e609f7d10b3254c1c162898e4ed6bc01475a014a SHA-256: db356a80707ee2b9026505c72fd770d39458c6c197c31d82a1d613a68cfb809c
92 Risk Score

Malware Insights

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

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 unreadable, but the presence of the malicious URL is sufficient evidence for the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=77495+%D0%BA%D0%BE%D0%B4+%D0%BA%D0%B0%D0%BA%D0%BE%D0%B3%D0%BE+%D0%B3%D0%BE%D1%80%D0%BE%D0%B4%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802444_fei__zagadka__piratskogo_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802437_skachat__igru__poisk_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802416_maynkraft__1__5_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000542bb.bin
b07906a72427c5ffdc483200c685869def7a6fda492b9db225ce43ba3fb4a08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542BB 8304 bytes
font_01_sfnt_off00055b1e.bin
2d360b3e306f15596b6710053452cb1caeb85faec376ca024fb279d44f63eaee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B1E 14360 bytes

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