Malicious PDF — malware analysis report

Static analysis result for SHA-256 9816f0527be33484…

MALICIOUS

PDF

342.5 KB Created: 2015-08-29 02:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ee1420cb889c744f55f2ddb1c7bc8594 SHA-1: 7bd0e986f41185e99aef14efcc1f809610b2fd92 SHA-256: 9816f0527be334845a967159a91e6a7c958416493e0b4b688a4bd2d6757073f1
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector at http://botcraftman.ru/. This suggests the document is designed to lure users to a malicious website. No scripts were extracted from this sample, and the document body was heavily obfuscated.

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=ducklife+4+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818516_keylogger__the_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817925_dnevnik__po__praktike_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818360_pourochnuye__planuy__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000513fa.bin
2b8bb4c8e97d52d77f39b21f16c1f9782ef06ce3c8b87c1e071d47532b8aea59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x513FA 8460 bytes
font_01_sfnt_off00052c0e.bin
ecd1f39928ba9252f1f0daaa53b02a94dd47d8607d1ed00a010cb8a05ee5db3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52C0E 15112 bytes

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