Malicious PDF — malware analysis report

Static analysis result for SHA-256 068b2cedd1a1ba52…

MALICIOUS

PDF

362.2 KB Created: 2015-08-21 09:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 3d5893dcead8730a6c2b91a31943658d SHA-1: 564a1d8ecd386ffdfa75ad94b7300db6091048cd SHA-256: 068b2cedd1a1ba520c312865d955c7c95c5c60c5edbfe43d46edd4a05f1d4c38
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also strongly flagged the file. While no scripts were extracted, the presence of a malicious redirector URL suggests the PDF is designed to lure users to a compromised site, likely for further exploitation or credential harvesting. The ClamAV detection name 'Pdf.Dropper.Agent-8915911-0' further supports its role as a dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8915911-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8915911-0
  • 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%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D1%82%D0%B0%D1%82%D0%B0%D1%80%D1%87%D0%B0+%D1%8F%D0%BD%D0%B0+%D0%B5%D0%BB+%D0%B1%D1%8D%D0%B9%D1%80%D1%8D%D0%BC%D0%B5+%D1%82%D0%B0%D0%BC%D0%B0%D1%88%D0%B0%D1%81%D1%8B&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654726_svodnaya_vedomost_po_zarplate_blank.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654714_star_stable_online_na_russkom_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654698_wetransfer_fayloobmennik_na_russkom_yazuyke.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056577.bin
752d519c9370b9a63d9784c5fc69fd4524f9c572ca8ff3433a72fbd1d191e82e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56577 7840 bytes
font_01_sfnt_off00057c17.bin
f608f0ce6435bd4f9238df2ba321438646fb7af357322fb7efa9ab9307e34182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C17 14516 bytes

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