Malicious PDF — malware analysis report

Static analysis result for SHA-256 de4c9288fac73b47…

MALICIOUS

PDF

352.0 KB Created: 2015-08-29 01:26:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0d5d99ce84e4320bd7fc5db180d130fc SHA-1: c8ce578d21aebf5138b60d37a634fac985163e9d SHA-256: de4c9288fac73b47b854d5596aabdf63106323baef038c7275e88900484097bb
90 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains an embedded link to botcraftman.ru, which is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its intended lure, but the presence of the malicious URL is the primary indicator of compromise. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=medieval+2+total+war+stainless+steel+64+%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://img1.liveinternet.ru/images/attach/c/7//4817/4817725_skyrim__moduy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817951_igra__santa__klaus_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817844_readmaniac__260_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005330a.bin
f0e4ebb1c110c8536f2ab06c0f7cf9813e698cd6b0f680eea3fe3feabad7cfb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5330A 9644 bytes
font_01_sfnt_off00054e56.bin
58bc86c0e302ed48129ad74aaf878d8e340fadd2368d9bb7ddbffc96f0c457ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E56 16432 bytes

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