Malicious PDF — malware analysis report

Static analysis result for SHA-256 935fecb7845f8550…

MALICIOUS

PDF

75.6 KB Created: 2021-01-31 20:32:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 6cbdb1f9bee15cf4a310d1c7be440db9 SHA-1: 45555fb8dd1eb3f9049042a7ca5bc52623d5406d SHA-256: 935fecb7845f85508680966d88466786073fcf51a89ed8b353db689b267d121c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to other PDFs, suggesting a link farm or SEO abuse for phishing. The primary lure URL, 'https://leonvi.ru/aws?utm_term=competitive+analysis+template+excel', is associated with a redirector, indicating a phishing attempt to trick users into downloading malicious content. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it's designed to facilitate malicious downloads, likely through a social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9723

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://leonvi.ru/aws?utm_term=competitive+analysis+template+excel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456122/normal_6013c3754cc52.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/jbnoAge/final_fantasy_xv_pocket_edition_pc_full_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fcdf36126329.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/pezav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449781/normal_5fe497dfc5ca9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471096/normal_5fffa5d8ba750.pdfIn PDF document text
    • https://detawokigar.weebly.com/uploads/1/3/1/4/131453745/2fa7eea1a0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451227/normal_6016b7c88d4b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412905/normal_5ffefdd1bbd6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454438/normal_600d881ab1750.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/3609363099.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/24538577324.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/equidad_e_igualdad.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10527 5120 bytes
SHA-256: 3c110155837324dc96b9913535b4f5a0084ae8fdda0dd041d474721f702f5daa