Malicious PDF — malware analysis report

Static analysis result for SHA-256 139f2963f724ed94…

MALICIOUS

PDF

360.7 KB Created: 2015-08-28 18:51:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a9f5128a333b17b35be340296a3f345e SHA-1: b3ab3f595a82515f3efbb4210f8e641e58a738bd SHA-256: 139f2963f724ed942f1f2fb1566471ddb7f6f6a21e241e20b026831db3346b7a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL, http://botcraftcraftman.ru/..., is likely part of a phishing or malware distribution chain. No scripts were extracted, but the presence of the malicious URL strongly suggests a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=%D1%81%D0%B8%D0%BB%D1%8C%D0%BD%D0%B5%D0%B9%D1%88%D0%B8%D0%B9+%D0%B2+%D0%B8%D1%81%D1%82%D0%BE%D1%80%D0%B8%D0%B8+%D1%83%D1%87%D0%B5%D0%BD%D0%B8%D0%BA+%D0%BA%D0%B5%D0%BD%D0%B8%D1%87%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BC%D0%B0%D0%BD%D0%B3%D1%83&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4810/4810325_otkruytuye__uroki__po_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4810/4810185_kenalog__instrukciya__po_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4810/4810551_skachat__sbornik__russkogo_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000560b0.bin
31491a38815b7e0ce4f879cc7283cef0ba97c4ccb1b41a1be35609ff7235edc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560B0 7740 bytes
font_01_sfnt_off000576d4.bin
8b3eb1d4122350256fc50cff3f85accc918eb38eb585c34fd8c8dd803020d142		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576D4 13748 bytes

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