Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c4ac715db2cb98f…

MALICIOUS

PDF

358.2 KB Created: 2015-08-28 17:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 17d9fa0c4c6f6ba57503e754b1c76af3 SHA-1: 4e895d7c426d5a246b2ada1369d47bf104d443f3 SHA-256: 7c4ac715db2cb98fd2763cfd87f6da49f7972c9662664bcbd31bc7dc0147f8f0
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its intended lure, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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=windows+7+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%82%D0%BE%D1%80+v193+by+daz+x86+x64&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809149_skachat__v__zlom_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809159_skachat__drayvera__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054c3b.bin
b13caa50a5e2eb9834ed388de5cb907fe27f1dfbe1f6f769fc0ab94d38728e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C3B 10036 bytes
font_01_sfnt_off00056946.bin
950708d7781ce711069017038433d15084b22ea8486178dc57b7321aa93906a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56946 15784 bytes

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