Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a7705028e6acf2…

MALICIOUS

PDF

357.0 KB Created: 2015-08-29 11:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-07-07
MD5: 20e47ed41d10875eaf23884ecfaa045e SHA-1: 399f21fb60fdf4eb76435eb0ca4b539b937d9271 SHA-256: 23a7705028e6acf2b4f2c8d322bd4df401c371c95340d73d15adae5a29d9e71d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This indicates an attempt to lure the user to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+quickbinder+%D0%B4%D0%BB%D1%8F+samp+03e&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830492_hitryuga__nosov_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830198_castellastva__lord__of_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830638_skachat__besplatno__programmu_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000545ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x545EF 10156 bytes
SHA-256: f148a540161d6b6bf6cc98106792a5617b1977484030ab79c971db0b5f41cf3b
font_01_sfnt_off000561f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x561F4 16888 bytes
SHA-256: 84584abf16dd9c51fd813e3a5c75a7732b713332a18315809558863258fa7bba

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