Malicious PDF — malware analysis report

Static analysis result for SHA-256 623890e1e3ccd591…

MALICIOUS

PDF

361.2 KB Created: 2015-08-20 07:27:08 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ec7bc3b30569e0fee555f3e81e8cab90 SHA-1: ce522f81b810765a9444cc875d324dc81a80ea78 SHA-256: 623890e1e3ccd59159981451d5cf0cec69f8681b48d3894a4c61680082980e03
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The embedded URL `http://botcraftman.ru/...` is confirmed as a malicious redirector. This suggests the PDF is designed to lure users to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8787427-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8787427-0
  • 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%BC%D0%BE%D0%B4+%D0%BD%D0%B0+%D1%81%D0%BA%D0%B0%D0%B9%D1%80%D0%B8%D0%BC+%D0%BA%D0%BE%D1%80%D0%BE%D0%BB%D1%8C+%D1%80%D0%B8%D0%B2%D0%B5%D1%80%D1%85%D0%B5%D0%BB%D1%8C%D0%BC%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638865_kay_figo_kanyelele_tekst_pesni_perevod.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638961_ogg_stream_reset_serialno_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638807_xinput1_3dll_dlya_windows_7_skachat_besplatno_cherez_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000558c8.bin
52cf229c406412516be092cd863fd14e0226a45ac00c051c6d0f7f5cf5970334		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558C8 8328 bytes
font_01_sfnt_off00057109.bin
607dddfd4c1f4750e36a38c9bd3b5d7e3ea83a4e3e847cf8b562d54285313476		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57109 17792 bytes

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