Malicious PDF — malware analysis report

Static analysis result for SHA-256 50c4ddffa05034e8…

MALICIOUS

PDF

354.8 KB Created: 2015-08-26 09:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d44fb1018de3017937a8286560f6ef03 SHA-1: 2957b1a059a3b990fa5cffdbe19ce7db39f1c56a SHA-256: 50c4ddffa05034e8007561f2501f7f9f02e80a6ee8fc89e570df1e2961fc24c4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for containing a link to a known malicious redirector. The ML classifier also assigned a high probability of 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, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%88%D1%80%D0%B8%D1%84%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+coreldraw+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752012_zvuk__sirenuy__pozharnoy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752006_zhestokie__igruy__2_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752068_trudovoy__dogovor__s_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000543fe.bin
c78b8ff261460ad25d350e4b3c23094dbe0f782d373132e8f846cbec9a5f76af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x543FE 9220 bytes
font_01_sfnt_off00055d52.bin
6ba8a96a53f3b0df4e3ab7ea1d369ed3be9f8bc313233ad902c2d3afca522ed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D52 15056 bytes

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