Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d3b073f4205f356…

MALICIOUS

PDF

357.4 KB Created: 2015-08-24 22:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e5ba217e196a795699f47a4e95b8fc5a SHA-1: 2b9492df923984d4194569718e6e7a8ecc94ccd1 SHA-256: 4d3b073f4205f356d4c2039ce821b6947670f51bdba9a8555451a67b3d7b7460
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is disguised as a download for Microsoft Office Picture Manager 2013. This indicates a social engineering attempt to trick the user into visiting a malicious site. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=microsoft+office+picture+manager+2013+%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+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4697/4697673_klyuch__produkta__windows_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4699/4699442_kriminalnaya__rossiya__krovavuyy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4704/4704985_tabel__oblku__robochogo_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000545db.bin
0be59389bd5148b7b6f088baeb3f24c547a0b02be6f962e5a0596ae8e5470a04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545DB 11060 bytes
font_01_sfnt_off00056485.bin
0a940260ece49058da875d9774f39d950565bee839a44f385f2c2b0ca65bd5b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56485 16256 bytes

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