Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c59fb93777740e6…

MALICIOUS

PDF

64.8 KB Created: 2020-12-23 08:50:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 703bc841d71e18458e404a714814ed07 SHA-1: 1730a7eebab3bc7a70b182c4fe3a486622c35ed7 SHA-256: 4c59fb93777740e62310d40d3f8b516234f2ad64a82d75bee5aa46b7656cd3ff
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a lure related to 'Buzzfeed shopping kitchen' and redirects to a suspicious URL, likely for phishing purposes. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://trafffi.ru/strik?utm_term=buzzfeed+shopping+kitchen PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454042/normal_5fccf6fe07103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477181/normal_5fbf033969fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416512/normal_5fab2d106af1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489586/normal_5fd08dc11cbf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368496/normal_5fdb9d3c6cd00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fdc3849cfb13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454425/normal_5fc46e33bfd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f92c51c7379c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382186/normal_5fd98dec9788e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fcfc951657f2d3dbcf16328/1607453011117/can_i_stream_nfl_network_on_hulu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e6675bcb0228a28f7e67/t/5fc787e55060c93fcd80c54b/1606911976838/duzekumosanitipot.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc9ff03a83d042422c3343/t/5fdcbd9927227574fbba159a/1608301978434/21391276094.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE9C 5240 bytes
SHA-256: 3bcf90947f5dfa7878abeaf6f1fdc7bf2c2c84b033a041544507df06cd195a92
font_01_sfnt_off0000d08d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD08D 12300 bytes
SHA-256: 56cc9260519206d915e25d54f7f0d32c3dccad3e29638597352ae40c887d4fe0

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