Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1d633e4d4aeeaa…

MALICIOUS

PDF

367.7 KB Created: 2015-08-28 11:43:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 919bf8b97346da9d4de61e013c8d3231 SHA-1: d4c70be17f9011b26cf74f16d465d556c047d938 SHA-256: 5d1d633e4d4aeeaa79c08cc3901c2a33da64eb6f0c8abd37e4c063334890087d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of this link suggests the document is intended to lure the user to a malicious site, likely for phishing or to download further malware. No scripts were extracted, but the malicious link is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%BA%D1%83%D1%80%D1%81%D0%BE%D0%B2%D1%8B%D0%B5+%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D1%8B+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802451_scenariy__prazdnika__1_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802539_padro__pio__kniga_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802548_kak__obnovit__gugl_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057ec0.bin
7e89d080a2ca6f958bccfe396ca5b9f9213160901683c9bac5b0dd8d9e4843dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57EC0 8056 bytes
font_01_sfnt_off0005961a.bin
8787a8baee2e9cd36c98b3181d74d572f934fefc6db93e85e64f60f9a003d726		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5961A 12872 bytes

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