Malicious PDF — malware analysis report

Static analysis result for SHA-256 281899b8b3700361…

MALICIOUS

PDF

352.2 KB Created: 2015-08-21 09:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1f8a29e46ce8b659def17ddeb08dc6fc SHA-1: 6f986b115d2f02b55052edc085123eb4a628175f SHA-256: 281899b8b370036159836db9b019a4b0d4cfc7659585ca46b8353ca6ff441ad1
90 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. The document body appears to be obfuscated or corrupted, but the presence of the malicious URL is sufficient evidence for this assessment.

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=Premium+access+e+obd+facile-car+diagnostics&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654753_skachat_igru_left_4_dead_3_cherez_torrent_licenziya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654732_skachat_whatsapp_na_sony_ericsson_u5i_vivaz.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654686_wifi_password_hack_v5_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000534db.bin
c9eceddac3d7e451af63780e66aeaeec087415e37a5c77895cb87d565b3b7ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534DB 10028 bytes
font_01_sfnt_off00055135.bin
22bf5f3ca082464523e8c1eebaf57b87080ba237ee099f75abe81147b07563d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55135 16348 bytes

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