Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d33a7e23f917e0…

MALICIOUS

PDF

394.7 KB Created: 2015-08-28 11:37:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a239396803e697b94f9611b660f67cdb SHA-1: 3a53b8434330c5d51564eaeb21a6d3140fdca5a5 SHA-256: f7d33a7e23f917e0b09c891ebd4a99eb526ed743f64292deaf035033d1b496d3
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, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BD%D0%B0+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD+%D0%BD%D0%BE%D0%BA%D0%B8%D0%B0+5530+%D0%B3%D0%BE%D0%B2%D0%BE%D1%80%D1%8F%D1%89%D0%B5%D0%B3%D0%BE+%D0%BA%D0%BE%D1%82%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802507_80__dney__vokrug_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802367_anketa__dlya__klienta_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802424_skachat__klient__minecraft_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005e187.bin
644763f7c32dd592aa9a7caefb5ceb765b0e87536b515edf00765e0c3b9bda54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E187 9140 bytes
font_01_sfnt_off0005fb6c.bin
886ab26d74d2b062789eb821ecd576f08014c9a53998d13e57fbac907f6a5454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6C 15508 bytes

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