Malicious PDF — malware analysis report

Static analysis result for SHA-256 1058d8cebcbf9d80…

MALICIOUS

PDF

380.1 KB Created: 2015-08-25 22:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-06-17
MD5: 176f8c0d197415d60185b666f7f49f17 SHA-1: 795d3798e12ea2e87a80b9d42b5e769756d9827e SHA-256: 1058d8cebcbf9d80dd5e350667a0a39491729a93de7258e60ce6ba0983d3daa2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the document with high confidence. The embedded URL is likely intended to lead the user to a malicious site, potentially for phishing or malware distribution. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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%B4%D0%BE%D0%B3%D0%BE%D0%B2%D0%BE%D1%80+%D0%BD%D0%B0%D0%B9%D0%BC%D0%B0+%D0%B6%D0%B8%D0%BB%D0%BE%D0%B3%D0%BE+%D0%BF%D0%BE%D0%BC%D0%B5%D1%89%D0%B5%D0%BD%D0%B8%D1%8F+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B5%D1%86+2014&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740765_skachat__wot__blitz_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4741/4741335_shablonuy__dlya_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740640_skachat__stiven__r_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005a889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A889 9152 bytes
SHA-256: ef2beb9bb1aeeb7338f0b979f7271948c4d34b55f57692aea75beb932a7c4a86
font_01_sfnt_off0005c359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C359 14376 bytes
SHA-256: ff669c894ddefe5bd89a3b7dd1a51ff097b6155615e56d52683cb03c39935ceb

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