Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af2e53154de6ec6…

MALICIOUS

PDF

85.0 KB Created: 2020-11-26 05:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 5d31b5e979495c0ff3fd69528bbdeb43 SHA-1: 5847f3d8841e57f11f59e168e9ce9bb6ebcd3555 SHA-256: 4af2e53154de6ec63af3418ec465374bb41751a4eb4076b5b1a0bcaaeb5da643
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://cctraff.ru/wb?keyword=best%20call%20and%20sms%20forwarding%20app%20android In PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/6a546ab710.pdfIn PDF document text
    • https://mamotuzukaw.weebly.com/uploads/1/3/4/4/134438076/wozadoluvov.pdfIn PDF document text
    • https://pesawesezopi.weebly.com/uploads/1/3/4/3/134327800/b2c5e9b1b0c9a2.pdfIn PDF document text
    • https://tumekisegazuf.weebly.com/uploads/1/3/4/6/134611428/70efe09e150057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449974/normal_5fa65ffc2f67b.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/71e61b17-17c7-4765-b1a3-0097a474cac2/how_to_fill_soul_gems.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/nupojef.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/dubar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72249db4-2ca2-40e4-9e64-a9ffadd59e32/dasitovogobojog.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/49048300565.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/acura_tsx_for_sale_manual_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e1f514a-94b2-4300-aa71-72355a0e44ea/nibura.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_off00010dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD9 5616 bytes
SHA-256: c06122e8f3256bc6f9c693b54eabddccb2a7bd9f67bd5802ab9b8324b9e2277b
font_01_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 11392 bytes
SHA-256: d45c0639525907bc7dad58b7452c8c1989e92105a01b970e059c09bdea9153e2

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