Malicious PDF — malware analysis report

Static analysis result for SHA-256 7feb8e849dcca2aa…

MALICIOUS

PDF

347.3 KB Created: 2015-08-29 08:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c1dfd417a28cc166eb48f65eba81b6aa SHA-1: fa1962ea6d62c3ca7e67a2ae29ac55b769cbac9a SHA-256: 7feb8e849dcca2aa95b28fe8ea752d9e319399515525d70daa21eb7284930cd5
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 a malicious intent to lure users to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of a malicious redirector. The document body is heavily obfuscated and unreadable.

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=a4tech+x710bk+oscar+%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//4822/4822265_dyukan__dieta__rasschitat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4824/4824506_aypi__serverov__maynkraft_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4823/4823241_skachat__serial__banditskiy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052513.bin
97f08f1d22d2ab41cdbac4a289a484a0e1c984847068a9686ff07864e7ce336f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52513 9660 bytes
font_01_sfnt_off00054062.bin
5ba7c62a3470e49d4554997e4c9e4382cebd0376817469c7167eddc1b2482dd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54062 15060 bytes

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