Malicious PDF — malware analysis report

Static analysis result for SHA-256 757e5318e81e8813…

MALICIOUS

PDF

362.1 KB Created: 2015-08-19 14:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1c64dd49ee8190ee0b00593504fdde84 SHA-1: 5d25781996a3b682ed59518b307e7ad47f45a72f SHA-256: 757e5318e81e8813fa061dd50ca8bbe6ffa0f9bbd8c449737a73f2143287f185
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure. The ML classifier also strongly flagged the file. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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-7620985-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7620985-0
  • 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=%D0%B8%D0%BD%D0%BA%D0%BE%D1%82%D0%B5%D1%80%D0%BC%D1%81+2015+%D0%BA%D1%80%D0%B0%D1%82%D0%BA%D0%BE%D0%B5+%D1%81%D0%BE%D0%B4%D0%B5%D1%80%D0%B6%D0%B0%D0%BD%D0%B8%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626670_skachat_windows_7_home_basic_oa_cis_and_ge_x64_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626666_formula_struynuyh_orgazmov_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626601_makrosuy_na_x7_warface_strelba_bez_otdachi.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055bb6.bin
947acd81128facd63364c83ebcde5d5b3bc3532ac8a09538f698bee22e63f613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55BB6 8884 bytes
font_01_sfnt_off0005751e.bin
dac4760c81b3b668baa77488f73d81e91e9fba7927d8ba05d4fdba5afd3f2683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5751E 17160 bytes

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