Malicious PDF — malware analysis report

Static analysis result for SHA-256 83895cda7e037fb8…

MALICIOUS

PDF

369.7 KB Created: 2015-08-27 23:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 97d10107dab494ceb7b9b4f12c9aed42 SHA-1: d7bb746309899faa9b2c32b50561870795f7c937 SHA-256: 83895cda7e037fb8624f091eaf0da58983a8d740c9e2214cb53ecc519ed2a80b
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful website. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of a malicious URL suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%BF%D1%80%D0%B0%D0%B2%D0%BE%D1%87%D0%BD%D0%B8%D0%BA+%D0%B7%D0%B0%D0%B2%D0%B5%D0%B4%D1%83%D1%8E%D1%89%D0%B5%D0%B3%D0%BE+%D0%BA%D0%B4%D0%BB&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788159_notuy__dlya__fortepiano_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788107_samarakurumoch__raspisanie_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787887_intel__82801ib__ich9_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057c33.bin
298628b9e9c67d4540ee1e15bf7d172de1845c13995808b4770c55a7da898ad1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C33 8768 bytes
font_01_sfnt_off000595bb.bin
57c5f2e899ad23ddc088ccd0f50d0ca384165b60c0ee68246bb247314971b0b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x595BB 16400 bytes

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