Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c63fed7734279c3…

MALICIOUS

PDF

354.0 KB Created: 2015-08-26 10:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 678c321723645b710ed07c5d13197c98 SHA-1: 0236f13dc793086bcf724038c756f17034cdab42 SHA-256: 5c63fed7734279c3147ff96a4a48545da5820bedd91b6380d2c0f5fc9780c42b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, 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 embedded URL is the primary indicator of malicious intent.

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=toshiba+satellite+a100-906&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752907_dolby__advanced__audio_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751695_igrat__gta__san_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752837_skachat__diskografii_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053c5d.bin
cba1cddd281afc53c2a6229fb9b283cab142dca4251da30cd3e21276498b7d54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C5D 9052 bytes
font_01_sfnt_off000555d9.bin
c3dd8cd6b895fc18587f3b1ec8034ad43e9e5b0a45b855fe9f131def32c079de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x555D9 16896 bytes

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