Malicious PDF — malware analysis report

Static analysis result for SHA-256 50e9b63acaf323d8…

MALICIOUS

PDF

365.5 KB Created: 2015-08-28 11:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 387340083faa6d2861df7694cd74b613 SHA-1: 714404c00f288c753ecdd042da0defbcffce6ca4 SHA-256: 50e9b63acaf323d8c53b26cb67d9587e19dc43dbe9d3d5933ce12878e8cc34e4
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 strongly indicated maliciousness. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and the malicious URL are sufficient indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B0%D0%B2%D1%82%D0%BE%D0%BA%D0%B0%D0%B4+2008+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802538_skachat__fruti__lups_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802778_skachat__call_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802419_skachat__maynkraft__s_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005693b.bin
630f4c5bc1d05cc32a0f1ff40d33c220868187340fed8f140d1293811a78b87a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5693B 9596 bytes
font_01_sfnt_off00058380.bin
9697d379c6fb1a6df60bd4d94998dcbf3e66229f9eff26048182b59ad1761fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58380 16780 bytes

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