Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a6f6f0d920a5a8…

MALICIOUS

PDF

352.7 KB Created: 2015-08-27 23:40:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d91498f4a1ae2d83a56cf2fce77a8755 SHA-1: 214eea5d7107dacb9422c43f666c189782c9b6d0 SHA-256: 16a6f6f0d920a5a8c86fe1913c274a5f9fd88c63c23d4cfa46e9f6f37b536393
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical finding for a malicious redirector link and ClamAV detection as a dropper. The embedded URL `http://botcraftman.ru/?lip&keyword=%D1%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD+%D0%B4%D0%BB%D1%8F+%D1%80%D0%B5%D0%B7%D1%8E%D0%BC%D0%B5&charset=utf-8` is the primary indicator of malicious intent, likely serving as a lure to download a second-stage payload. No scripts were extracted, but the PDF structure and malicious URL strongly suggest a dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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-9294433-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9294433-0
  • 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%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD+%D0%B4%D0%BB%D1%8F+%D1%80%D0%B5%D0%B7%D1%8E%D0%BC%D0%B5&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787920_detskie__raskraski__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787766_cfg82a4cfg__os82a4img__yfappwzp_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787981_spravka__2ndfl__za_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053856.bin
35790513306c46ebc93541d80b548851ab8ae16dead4811580f6dbaf173fd3ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53856 9092 bytes
font_01_sfnt_off000551bb.bin
ed3c55bee85a79d1c289cae45ea20ac2251209eb9098788fb684649fa4c26724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x551BB 16704 bytes

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