Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b6eee4f3be0c535…

MALICIOUS

PDF

306.0 KB Created: 2015-08-26 10:22:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c4653e7110f619a1aacc7c2a11111ad2 SHA-1: 387ecbbe05d8f3d721b04a5914d3ee235df94bf1 SHA-256: 5b6eee4f3be0c53536458bd939cb58c440572ea45abbcdd9186f8c602220cf5d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru. This heuristic, combined with the ML classifier flagging the document as malicious, strongly suggests the intent is to redirect the user to a harmful site. No scripts were extracted, but the embedded URL is the primary indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7288

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%B1%D0%BE%D1%82+%D0%B4%D0%BB%D1%8F+bsfg&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751633_skachat__knigu__po_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752632_igra__metro__2_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752676_archeage__prohozhdenie__za_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004801e.bin
d15ea16c0945a77331941aeddb830c7e8adaf3443e177297b08ce3f72cd2fce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4801E 8588 bytes
font_01_sfnt_off00049923.bin
23da114a8fa2327c43d305da18d0846651ceb2c6ab3e11ed295169187cd6fa15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49923 15316 bytes

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