Malicious PDF — malware analysis report

Static analysis result for SHA-256 50525bed1c672542…

MALICIOUS

PDF

354.7 KB Created: 2015-08-29 11:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-07-07
MD5: 921f631f02c054fa314c3555513da557 SHA-1: 815545f18f142db7729df07a9ebbe1efd123dc2e SHA-256: 50525bed1c67254255ab559e514437651c5edfdaa84d176044ac9466b449ba61
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link to a known malicious redirector URL, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for a phishing or malware distribution attack.

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=%D0%BF%D0%B5%D1%81+2015+%D0%B4%D0%B5%D0%BC%D0%BE+%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 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830437_razvivayuschiy__uhod__za_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830942_stiralnaya__mashina__amortizacionnaya_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830581_raspolozhenie__predohraniteley__volkswagen_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54459 7444 bytes
SHA-256: ee80b216fd854f987bd75cd25f3b8f64f048d3bcb9c159d40c4690aed723500e
font_01_sfnt_off00055a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55A17 15984 bytes
SHA-256: 3a281094aebd2f210e5b77ec471935ce346e0eda3c18d926deb71a6fad9e2872

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