Malicious PDF — malware analysis report

Static analysis result for SHA-256 f343bc39b76fbe5c…

MALICIOUS

PDF

371.8 KB Created: 2015-08-25 22:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f1845a07f426ef693336ed06e0e4727a SHA-1: 02d790c5629bf0cdb57b57eb39f4be823c8d4e6f SHA-256: f343bc39b76fbe5c2f8453f90cae996c71bbe9cde3e013bea4d9cb9e4fbe57df
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 containing a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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%B0%D0%BB%D1%8C%D0%B1%D0%BE%D0%BC+%D1%82%D0%BE%D0%BD%D0%B8+%D1%80%D0%B0%D1%83%D1%82+%D1%80%D0%B0%D1%83%D1%82%D0%B2%D0%B8%D0%BB%D0%BB%D1%8C+2013+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4733/4733373_pyatdesyat__ottenkov__temnee_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4736/4736616_skachat__uno__psp_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4734/4734308_temuy__dlya__android_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058656.bin
9e04b1adb1ec97cc3365e7899f5beeb62a70005c31ef0bb301eddb4b8fa6a90f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58656 10148 bytes
font_01_sfnt_off0005a265.bin
1eaeb34d4d93a8cff2bcbff14ee060b77ff5d2de81bca45aa06e11553e818cc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A265 14288 bytes

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