Malicious PDF — malware analysis report

Static analysis result for SHA-256 84dfd9e1aefd7546…

MALICIOUS

PDF

349.0 KB Created: 2015-08-28 18:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c499c13cd0715edaf49e98eaf42b1af2 SHA-1: 350e549f7e0a2f3dc76a57858b6b017bfe45bd41 SHA-256: 84dfd9e1aefd7546b2d5341c8128acd913eadf238cfffbd02df8a68b41132f53
90 Risk Score

Malware Insights

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

The PDF document was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is confirmed as a malicious redirector. No scripts were extracted, but the presence of the malicious link strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%BF%D1%81%D0%B8%D1%85%D0%B5%D1%8F+%D1%83%D0%B1%D0%B5%D0%B9+%D0%BC%D0%B5%D0%BD%D1%82%D0%B0+%D1%82%D0%B5%D0%BA%D1%81%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809843_skachat__perkussii__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809397_doma__iz__penoblokov_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4810/4810690_zaderu__ya__lenke_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052f38.bin
13eb8c722ee50712a0f05d49184e0b39b0ff28f657fc274add7408eb15605f39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F38 8156 bytes
font_01_sfnt_off000546d1.bin
92f5340905b7eaa0c930330b40f6e5da391b6d71b5c4fd16da630cd1df170771		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546D1 14588 bytes

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