Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c25cd90cf43667…

MALICIOUS

PDF

369.0 KB Created: 2015-08-24 00:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: af664e7a6ff6877297ec55d5f122203f SHA-1: a68f799ab8dc5503abf534e86d3575f0207af8d3 SHA-256: 98c25cd90cf4366793c0da748332054bb7bed0bc0331e6074296db53ea0f5815
98 Risk Score

Malware Insights

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

The PDF contains an embedded JavaScript stream and a critical heuristic firing indicates a malicious redirector link. The primary IOC is the malicious URL, which is likely used to host further malicious content or phishing pages. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=color+pilot+480+portable+rus&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693594_dizaynuy__mashinnoy__vuyshivki_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694002_deadpool__2013__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693585_windows__7__maksimalnaya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057f40.bin
50fcdc2db3d86c2ad8e18eeb21b87da875cf2e6f7694f5d1a301397bcef227b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F40 7076 bytes
font_01_sfnt_off000593c5.bin
970f0bb18f7e69aca93623da989516e494ad31e384b5063657c3bf42970f60c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593C5 15756 bytes

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