Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4b5e94197c0d11…

MALICIOUS

PDF

368.8 KB Created: 2015-08-27 23:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 34cc8bc0ad1a58bce8950eca0c7752be SHA-1: a193092a995964d68e26e0c146b9278afda9f55e SHA-256: ff4b5e94197c0d1154e73d12d4a7859fb06a3da481381a840876d18ba12c6c7d
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to botcraftman.ru. This suggests the document is designed to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%D1%80%D1%85%D0%B8%D0%B2+%D0%BF%D0%BE%D1%80%D0%BD%D0%BE+%D1%84%D0%BE%D1%82%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787815_polyakova__russkiy__yazuyk_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788284_pinetki__dlya__novorozhdennuyh_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788201_skachat__igru__govoryaschiy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058256.bin
2f0718089be71e863f70f7404eed61bd17fcdbcf99bec11f9a79263d8feef58b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58256 8260 bytes
font_01_sfnt_off00059a2a.bin
73c42c8737c76ea772fb41055a123d8fd614fa1f91873f0d4880bac790f0e5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A2A 13068 bytes

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