Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5911a38c703ad3a…

MALICIOUS

PDF

349.8 KB Created: 2015-08-29 02:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 2ed249ede55873e41104f4d77126fefd SHA-1: 7631b859bf7e0c97c6e8cd35353d2c682ea47c0f SHA-256: e5911a38c703ad3ab17e53ea027ae050e689eccdd9093a724ab0d8d9975689e4
132 Risk Score

Malware Insights

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

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 strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence for a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%88%D1%80%D0%B8%D1%84%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D1%84%D0%BE%D1%82%D0%BE%D1%81%D0%BA%D0%B0%D0%B9%D0%BF%D0%B0+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818124_test__shmisheka_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818189_audio__anekdotuy__skachat_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818078_skachat__igru__tank_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000539f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x539F9 8864 bytes
SHA-256: 579071426434b31bf849f724ed99959dca65cd8f09b86ebb932b7e477c083111
font_01_sfnt_off00055313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55313 11076 bytes
SHA-256: 0bf1c1f20f6a02f92f5e7251302203eead16da25c307dc0264eb2a6c440a8894

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