Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1777dfe4109bd32…

MALICIOUS

PDF

367.4 KB Created: 2015-08-22 09:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f7e5e20b9bf78febea8f6c25fbbcd2bd SHA-1: 6f6690d8cc545ae10d15ff0d36e890185b1ea995 SHA-256: b1777dfe4109bd326269a0941be8b94301af51223b2e38af7824e331aeeb68ef
90 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 associated with malicious activity. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D0%B7%D0%B0%D0%BA%D1%80%D1%8B%D1%82%D0%B8%D1%8F+%D0%BB%D0%B5%D1%82%D0%BD%D0%B5%D0%B3%D0%BE+%D0%BE%D0%B7%D0%B4%D0%BE%D1%80%D0%BE%D0%B2%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D0%BE%D0%B3%D0%BE+%D0%BB%D0%B0%D0%B3%D0%B5%D1%80%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674630_prikolnuye_zvuki_dlya_windows_7.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674724_skachat_igru_maynkraft_149_cherez_torrent_na_kompyuter_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674697_skachat_blok_launcher_pro_dlya_maynkraft_080.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000574d8.bin
827f6b6958dcb432ef7640be9f655a148943a0713df934cba87e7b2f94e22550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x574D8 9300 bytes
font_01_sfnt_off00058fe2.bin
aa2225ac7f43338365cf02d9097548a77074d3f488e1e31b8c2b6c764b257309		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE2 14824 bytes

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