Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12ea1b8fbb5c297…

MALICIOUS

PDF

349.4 KB Created: 2015-08-28 11:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: de40bc08ceba252c44974ad916e4b7a6 SHA-1: 92e3e7e784a1738da8892deedf6252d7954531fd SHA-256: a12ea1b8fbb5c2972148439972d1cba25163591dab3ab429aab87ee3ef622622
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is the primary indicator of compromise.

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=winzip+%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//4802/4802371_shema__ultrazvukovogo_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802380_skachat__minecraft__0_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802407_kak__pisat__zayavlenie_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052f4d.bin
8c3e51d00572c1f3496e9d990af422663d5870a24dcba228ea056f4794fe5435		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F4D 8232 bytes
font_01_sfnt_off000546d1.bin
8ded74fcc6e02a5da6aabb793e3158d0a1bcc0fd8ef2ce4607a4f459cead9f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546D1 15508 bytes

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