Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f140403b611879…

MALICIOUS

PDF

344.1 KB Created: 2015-08-25 23:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b7c690ab533a3a1efad72f0369dd57c1 SHA-1: 05064d030a021b37e244e952182a39a989407be2 SHA-256: 94f140403b611879c0d7d659255ad14cca4eaf41690fa12eb7338e6bd5fe65ea
98 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and a critical heuristic firing for a malicious redirector link. The link `http://botcraftman.ru/?lip&keyword=%D1%83%D0%B7%D0%BD%D0%B0%D1%82%D1%8C+%D0%BA%D0%BE%D0%B4+%D0%BE%D0%BA%D1%82%D0%BC%D0%BE+%D0%BE%D1%80%D0%B3%D0%B0%D0%BD%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D0%B8+%D0%BF%D0%BE+%D0%B8%D0%BD%D0%BD&charset=utf-8` points to known malicious infrastructure. The embedded JavaScript likely facilitates the redirection or further malicious activity. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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%83%D0%B7%D0%BD%D0%B0%D1%82%D1%8C+%D0%BA%D0%BE%D0%B4+%D0%BE%D0%BA%D1%82%D0%BC%D0%BE+%D0%BE%D1%80%D0%B3%D0%B0%D0%BD%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D0%B8+%D0%BF%D0%BE+%D0%B8%D0%BD%D0%BD&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741812_kak__vzlomat__dengi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741327_prohozhdenie__tekstovuyh__kvestov_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4742/4742102_skachat__luchshie__pesni_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051aef.bin
d9d53624f5bdc7850c35b74c7b615b705fbedf613ec4b2a18fa9de68b6ae4d96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51AEF 9552 bytes
font_01_sfnt_off000535b0.bin
8dfbe4e67bbcd3c7b27e8f63fe7f8c1e83d00b9aecc120fa4b866bbeffddb1b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535B0 13424 bytes

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