Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76708bf245f3f9f…

MALICIOUS

PDF

369.7 KB Created: 2015-08-25 15:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e3a90e8c89b16734fa5d2397a191aefb SHA-1: 85c6e50841e40a69c7bc9a87d097366ccde3cd9c SHA-256: d76708bf245f3f9f8dff73a34b17fb41d1750b142c3e319065a372766e0081dc
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is likely part of a phishing or malware distribution chain. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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%D1%81%D0%BC%D0%BE%D1%82%D1%80%D0%B5%D1%82%D1%8C+%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D1%8B+%D0%B3%D0%B8%D0%B0+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+2015+9+%D0%BA%D0%BB%D0%B0%D1%81%D1%81&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4732/4732820_the__sims__complete_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4732/4732452_kodeki__dlya__windows_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731337_skachat__carstvo__2_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057cdb.bin
4440218ac544dc1164bb2025b4ce8788a7859f4106701d3db2ae9530bec88495		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57CDB 9048 bytes
font_01_sfnt_off000596cb.bin
c59ffffd2dbef81bc1b49ec13df63a92dd80bbd560fd9969f35efa2c7a8f8f2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x596CB 16280 bytes

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