Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae49a3451c06d943…

MALICIOUS

PDF

363.7 KB Created: 2015-08-28 11:30:37 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c85bdfc37fc4e5cada0d87e92658dda3 SHA-1: 97ab0cdb465b5668c99b57dfd6d3358a7449f4c6 SHA-256: ae49a3451c06d943e579ff0f981f646599583857c7997f751b5f8a41ea10277a
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL http://botcraftman.ru/... is confirmed as a malicious redirector, suggesting the document's primary purpose is to lure users to a harmful site. No scripts were extracted, but the PDF structure and the malicious link are sufficient indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%D0%BE%D0%B4%D0%B3%D0%BE%D1%82%D0%BE%D0%B2%D0%BA%D0%B0+%D0%BA+%D0%B5%D0%B3%D1%8D+2015+%D0%BF%D0%BE+%D0%B8%D0%BD%D1%84%D0%BE%D1%80%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802378_uchebnik__po__arhitekture_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802374_stalker__misery__201_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802362_imperiya__angelov__bernard_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056312.bin
984bcbd2da5175bd43e9a6d6f941b14b66639009861eea081502ef45cc2176d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56312 8708 bytes
font_01_sfnt_off00057c6f.bin
c4581bfaf7a80ef9c4b4cd2b07d927dce3ed023ab9deebf8344b9d05ba84927e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C6F 16556 bytes

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