Malicious PDF — malware analysis report

Static analysis result for SHA-256 91929e66a97ebbf1…

MALICIOUS

PDF

58.6 KB Created: 2021-02-25 14:58:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: d5e1662aa0281d37919244f22572ae7e SHA-1: a56ce8822c2793bb98f8d8150c87fdccdf24087a SHA-256: 91929e66a97ebbf175b64777bee5619d8f58796cab5e0171717e793e7604bfd8
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a phishing lure, specifically using an image to redirect users to an external SEO redirector. The embedded URL and the high ML classifier score further support this assessment. The primary IOC is the redirector URL, which is likely part of a credential harvesting scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9055

Heuristics 4

  • 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
  • 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://jottigo.ru/award?keyword=how+to+calculate+15+percent+tip PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385217/normal_5fd640372d541.pdfIn PDF document text
    • http://affilateapp.online/how_to_open_kenmore_70_series_dryern7q4o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393779/normal_600ad887c4fc4.pdfIn PDF document text
    • https://jigugupidutugi.weebly.com/uploads/1/3/0/8/130813301/9370547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472494/normal_601602161d566.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/pifoled_nakiden_simigug_roxolotiboraxeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409819/normal_6034100381bec.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/xagagoxubedugizo.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/27993971781.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/59994204581.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/pufuxaropejum.pdfIn PDF document text

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