Malicious PDF — malware analysis report

Static analysis result for SHA-256 11695869902dd381…

MALICIOUS

PDF

363.8 KB Created: 2015-08-28 17:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: fae802408b959143c7ab4d884b97289c SHA-1: cea0c8ef7028ae96ea0c752110012b001501172b SHA-256: 11695869902dd381aba79f2e29f944b60297e06138595fdce79307f0b08d3781
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a malicious redirector link to http://botcraftman.ru/. This URL is likely used to lure the user to a malicious site for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=cubase+%D0%B4%D0%BB%D1%8F+windows+8&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809139_tohatsu__98_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809153_kontrolnuyy__diktant__po_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809150_benhack__dlya__koroli_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000565de.bin
df451e42e204d7144915a68bc2c2a4750fec639943b47d056459fd8f8584c8a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x565DE 9236 bytes
font_01_sfnt_off00057f51.bin
99046fb56fb190a051d315b4aca1c28c1f054129c8c475ede0a6916237f47ac5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57F51 16236 bytes

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