Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a20077c90617a5…

MALICIOUS

PDF

343.8 KB Created: 2015-08-24 01:34:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c2077df58cc82177f89b77bdae788192 SHA-1: 7c373e791c57a6979842a5e21d2c5ba612a4020b SHA-256: 93a20077c90617a54ccf45bca41410a893ee374ec7164c6917e3e10827e6f0c8
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and does not provide clear textual clues, but the presence of the malicious URL is sufficient to determine the attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=sculptris+alpha+6+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693190_rlddll__skachat__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4692/4692990_prikaz__o__pravilah_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695718_karta__port__aventura_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000512f0.bin
4f08b1ccd4b6431e2bfc710fd7af56b634d993fd356d958f823f3ae94279423c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512F0 8732 bytes
font_01_sfnt_off00052afa.bin
1403eed5426086cadd6229acac2bc38572bcde07fb83001984c7a18549778d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52AFA 17508 bytes

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