Malicious PDF — malware analysis report

Static analysis result for SHA-256 371d3d83bc0273e1…

MALICIOUS

PDF

351.3 KB Created: 2015-08-25 15:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2026-06-05
MD5: 37d7a0f44f75a9135600b2a01100c23b SHA-1: 595e312873bb3fe742158bd98995f3e313aeab0b SHA-256: 371d3d83bc0273e189276d95ba5097d7f5c8397be3a984bc9bb3a639f18717b5
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a URL associated with malicious activity, likely to trick users into downloading malware disguised as a printer driver. The heuristic firings indicate the presence of a malicious redirector link within the PDF, and the ML classifier strongly suggests maliciousness. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80%D0%B0+%D0%B4%D0%BB%D1%8F+%D0%BF%D1%80%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%B0+hp+deskjet+f2480&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731633_sumerki__saga__skachat_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731646_skachat__proshivku__na_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731183_street__legal__racing_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000533de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x533DE 9572 bytes
SHA-256: fb0084ea281241471d0bb64dc019f68b392b4c0aa78025829aa5da68bd0d180c
font_01_sfnt_off00054f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F3F 14876 bytes
SHA-256: cd3e20bae52af84fec3844640be28a2301535feb7912f7ad5c404e4384b082ed