Malicious PDF — malware analysis report

Static analysis result for SHA-256 d739ade3a1778de1…

MALICIOUS

PDF

352.3 KB Created: 2015-08-22 09:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f8267b998d6b0cd0da3fdd5fceb55894 SHA-1: 7b1f645a290d66949aca03d60ed025bb048645c7 SHA-256: d739ade3a1778de114ceb18bfc0f24c687e4c48743f440fd931c1873f930b806
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, http://botcraftman.ru/, which is likely intended to deliver malware or lead to a phishing site. The document body, though heavily obfuscated, contains keywords related to game downloads, suggesting a social engineering lure. The ML classifier also strongly indicated maliciousness.

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=counter+strike+global+offensive+%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+%D0%BC%D0%B5%D1%85%D0%B0%D0%BD%D0%B8%D0%BA%D0%B8&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674674_skachat_igru_aleksandr_udacha_soputstvuet_derzkim_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674541_klyuch_k_igre_soldatiki_chitat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674651_warcraft_3_frozen_throne_kartuy_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000533f8.bin
f40119db6b3400628ef4e4731a3bd4d9117ac3523f5193af7309871bca97739e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533F8 9432 bytes
font_01_sfnt_off00054e2c.bin
bf7bda8f5560a60ea1c3b50464a6f6c7ebf51c8d0870e7c7367536424bf3b785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E2C 16804 bytes

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