Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f77494bb784ffb1…

MALICIOUS

PDF

372.8 KB Created: 2015-08-21 09:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f4ed12e6e21ae9870ccf157b3f0d4e18 SHA-1: 37bea3431a66c33785e0a42bc55a24276f9eadd2 SHA-256: 0f77494bb784ffb143592d1745d26bf576d61167fb3d0395c8c29b217b9596c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is indicative of a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence. Although no scripts were explicitly extracted, the presence of embedded URLs and the heuristic firings strongly suggest malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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=wolfquest+3+%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%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654684_kogda_budut_izvestnuy_rezultatuy_egye_po_himii_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654756_skachat_my_talking_tom_na_kompyuter.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654712_skachat_drayvera_dlya_noutbuka_asus_x54c.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000584d7.bin
b6d23ff7c52b9330125f36ca00d5b7d6a45d2e3d79dd38496fe68a0fd9d093e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x584D7 8976 bytes
font_01_sfnt_off00059e75.bin
96255f05c824a7382ce645e59bc38fea527ba164a31f851cc3233c03735c975f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E75 17768 bytes

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