Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33dbefce8b01077…

MALICIOUS

PDF

71.0 KB Created: 2020-11-27 11:36:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26a89bbfc5bd608d0c89ca417f21d5d9 SHA-1: 7f93455278f829f966668783a854f7c1968d4d9d SHA-256: c33dbefce8b01077e335a1ae13c3633a595929c47c739bcedd690e92db4b8632
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to SEO redirectors, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution lure, likely using JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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
  • 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://traffnew.ru/aws?utm_term=arkabutla+lake+fishing+guides PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412778/normal_5f98f69100c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383577/normal_5f9a4997bf77a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f87d40ddb8de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387562/normal_5f9086438562e.pdfIn PDF document text
    • https://kibodowusi.weebly.com/uploads/1/3/4/5/134588916/8286799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f87266c8aa9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389074/normal_5f8e3375e0b6c.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/resujedefovalex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450141/normal_5fad9ebf3cab4.pdfIn PDF document text
    • https://memefuzagimo.weebly.com/uploads/1/3/4/6/134612336/wivonob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456369/normal_5fb2645d76927.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f349c4fc-9e3b-467b-9f90-7de92804d256/guxopibosedoxem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e70366-051e-4d76-9bbc-ba95e80c3d66/megodugoxuxekewuposokomoz.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DC 5364 bytes
SHA-256: 0d78bb80701bb1fcec8c1408bab8758fc49e92bd879270e7187a49b1404b506a
font_01_sfnt_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 10912 bytes
SHA-256: 68896ce7fa222c59b11d0c0d2e948f887ebba1e0ad2c241e7a24c001b77795d4

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