Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec31d762f0f56a2…

MALICIOUS

PDF

357.2 KB Created: 2015-08-29 01:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-05-29
MD5: f9113512bcc9ad9d6c34db4e21b173df SHA-1: ed8d520ad4115405f4d4244fcc67c00b82a76e2c SHA-256: 8ec31d762f0f56a25eb887155ebeb43c648869d95acaa3e44589dd1a759b723d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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%B8%D0%BB%D1%8E%D1%85%D0%B8%D0%BD%D0%B0+%D1%87%D1%83%D0%B4%D0%BE+%D0%BF%D1%80%D0%BE%D0%BF%D0%B8%D1%81%D0%B8+%D1%83%D1%87%D0%B5%D0%B1%D0%BD%D0%B8%D0%BA&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817733_windows__8__single_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817659_skachat__omsi__2_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818138_slayd__shou__na_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54A5D 8396 bytes
SHA-256: 9368404cb207b292b58cdc59ee78c44a48ca5500963ca044c5eee29be9c3c6e5
font_01_sfnt_off000562e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562E5 16244 bytes
SHA-256: aaf514192e4dfe3e49f09a2b6858ea8ebe08245d01a0413389a38cb4931a0297

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