Malicious PDF — malware analysis report

Static analysis result for SHA-256 08113d2d5dca91a6…

MALICIOUS

PDF

360.5 KB Created: 2015-08-27 23:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: fe03171454e252659499e85b4d69271c SHA-1: 3c8cb202272712ba92700d56b3c3af340febbc4b SHA-256: 08113d2d5dca91a6b4acb4b71227ddbcaf096072ebb8b22527577f98a646ee58
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's high confidence, strongly suggests malicious intent. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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%B4%D0%BE%D0%B3%D0%BE%D0%B2%D0%BE%D1%80+%D0%B0%D1%80%D0%B5%D0%BD%D0%B4%D1%8B+%D0%BA%D0%B0%D1%84%D0%B5+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B5%D1%86&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787944_mount__and__blade_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787797_kamenistuyy__artem__audioknigi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787800_skachat__obrazec__dogovora_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055b92.bin
f8532df2804a4da24186f7d099bc92dd416a1ae91e7f149e41cb5dd7c1dbb966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B92 8428 bytes
font_01_sfnt_off00057433.bin
f5cf2aaaac839618f9ba57b964d4c6d9558eb5f967120641b6a8311aad44be8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57433 15204 bytes

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