Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce9c68da54b494c…

MALICIOUS

PDF

355.7 KB Created: 2015-08-22 08:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f38a9c2e7b4e1e7c41e1b5141b1b9eb9 SHA-1: 2bc5f11dcc9d28705f97eddae45d2d4acdbcc52d SHA-256: 4ce9c68da54b494cc4a305003cf1c1aa3dc7d2b60a7c967d031902d0a689c2a9
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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%98%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F+%D0%BF%D0%BE+%D1%80%D0%B0%D0%B7%D0%B1%D0%BE%D1%80%D0%BA%D0%B5+nikon+d3100&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674488_skachat_igru_luntik_uchit_cifruy_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674503_allj_yeldzhey_skachat_albom_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674496_audiokniga_zahar_berkut_ivan_franko_slushat_onlayn.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054365.bin
645d386bb1f1062c12ebc1f3204ab957730efd336d96970fde6425728f1457ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54365 9576 bytes
font_01_sfnt_off00055f61.bin
51de32ee01a124d812c4fb1c97257cd47204f7707c45a062f689eb2bca4781f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55F61 15276 bytes

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