Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d7e0d7688e59be…

MALICIOUS

PDF

372.3 KB Created: 2015-08-26 11:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 2ec977b3b1f43e52041e688d9556f211 SHA-1: cc7c24ab7579d1bacc2e59ea1e77539cda7d4169 SHA-256: a5d7e0d7688e59be034fc32184cbf1b9a2ded1d943e2882820e6440f5cdd5a53
132 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to a harmful external site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 3

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=%D0%BF%D1%80%D0%B8%D0%BA%D0%B0%D0%B7+%D0%B3%D0%B5%D0%BD%D0%B5%D1%80%D0%B0%D0%BB%D1%8C%D0%BD%D0%BE%D0%B3%D0%BE+%D0%BF%D1%80%D0%BE%D0%BA%D1%83%D1%80%D0%BE%D1%80%D0%B0+%D0%BE%D1%82+24+04+2014+%D0%BE%D0%B1+%D0%BE%D0%B3%D1%80%D0%B0%D0%BD%D0%B8%D1%87%D0%B5%D0%BD%D0%B8%D0%B8+%D0%B2%D1%8B%D0%B5%D0%B7%D0%B4%D0%B0&charset=utf-8 In PDF document text
    • http://botcraftman.ru/?lip&keyword=%D0%BF%D1%80%D0%B8%D0%BA%D0%B0%D0%B7+%D0%B3%D0%B5%D0%BD%D0%B5%D1%80%D0%B0%D0%BB%D1%8C%D0%BD%D0%BE%D0%B3%D0%BE+%D0%BF%D1%80%D0%BE%D0%BA%D1%83%D1%80%D0%BE%D1%80%D0%B0+%D0%BE%D1%82+24+04+2014+%D0%BE%D0%B1+%D0%BE%D0%B3%D1%80%D0%B0%D0%BD%D0%B8%D1%87%D0%B5%D0%BD%D0%B8%D0In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752564_onlayn__translyacii__futbolnuyh_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4754/4754074_teksturuy__dlya__arhikada_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752976_kasperskiy__probnaya__versiya_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58B4E 8892 bytes
SHA-256: 7bea5d5b29e8c9a8d08a34ef2611fcab7eb20c429ab1fa98fa195cbe938a353a
font_01_sfnt_off0005a4eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4EB 13976 bytes
SHA-256: 0a84d24cd49ce27fdb5f29d4311f24e48b0f4ec04926fcdcbf3910e22f9920af

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