Malicious PDF — malware analysis report

Static analysis result for SHA-256 b39ead4392ef2acd…

MALICIOUS

PDF

360.4 KB Created: 2015-08-28 18:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9a946f93f0b012684cf384ed8a15cb3e SHA-1: 489ca6fe30776483aa74d4866cf539d5e4792aad SHA-256: b39ead4392ef2acd551227f6274655b7bf5a85744c313e3a11533650a0ecee1b
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 http://botcraftman.ru/... is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download page. No scripts were extracted, and the document body was heavily truncated and unreadable, limiting further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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%BF%D0%B5%D1%81%D0%BD%D1%8E+%D0%BF%D1%80%D0%BE%D1%89%D0%B0%D0%B9+%D0%B0%D0%BD%D0%B4%D1%80%D0%B5%D0%B9&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809507_papa__mozhet__tekst_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809272_ustanovka__navitel__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809351_kontrolnaya__rabota__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055920.bin
e3f7e63e6f7d2325006a81761d234fc1be1e33c80f3e202450d91fe007c31b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55920 8060 bytes
font_01_sfnt_off00057052.bin
83dba63d85159af2e868e607472f192ced4d649f0a244a9b3c75f07aafa51b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57052 16224 bytes

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