Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5bdda87e491437…

MALICIOUS

PDF

368.4 KB Created: 2015-08-27 23:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 173070761ccb5d88c5b372b9f360a5e5 SHA-1: bdef7c036f3745ff75755fed443062968f68f6b1 SHA-256: ea5bdda87e491437183700e272d29be4c20e89de80fc1d166f1d30b828fee500
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 known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'botcraftman.ru', which is associated with malicious activity. The document body is heavily obfuscated and appears to be non-readable content, suggesting it's primarily a container for the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=Tool+1cd+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788015_prikoluy__dlya__rabochego_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788031_skachat__realnuye__pacanuy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787907_platezhnoe__poruchenie__v_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058275.bin
b8d4ef4f13358d107a4c912bf0ab77e8ed27f7b2160f931f1b6665e11a9df1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58275 7824 bytes
font_01_sfnt_off00059844.bin
db8225c7e2797464250f6dcdd42f84866ea0557582eb6cb6035e0b6e58e3502d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59844 13436 bytes

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