Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb7d1e4b2714344e…

MALICIOUS

PDF

50.6 KB Created: 2020-12-21 19:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a7ad4b01f3f3d090b73d47f257f7ecb7 SHA-1: f497b4824499a4d8612ab88d7511eea92e73cd2f SHA-256: cb7d1e4b2714344ebf0e9a2efefea0d4aaa46601407b123c68857b983bcb9855
192 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it is a malicious redirector, specifically designed to lure users with a "free download" pretext. The embedded URL leads to known malicious infrastructure, suggesting an attempt to deliver a second-stage payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7011

Heuristics 4

  • 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.
  • 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.
  • 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/aws?utm_term=bit+web+server+apk+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5f9f356c71d67.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/baziziroguvog-teronekox-lifuxi-najaloka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530712/normal_5fc6daf3b8e3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_5fa7b34ce8c65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5fac53aaef981.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_5f982d9fbc6b2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5668583a-ed9d-487c-a17a-4aed3cb814fd/new_york_fashion_week_kids.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65d419fa-d4a6-46c5-9fa3-5dbf9ad0516d/square_d_hepd80_install.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74d7d1ee-a5c6-4552-b7c6-f12ecebe090e/basic_and_clinical_pharmacology_14th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/mefexuxodubuwatado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feacc789-bece-45a9-befc-fe9284a0f9a4/52121631981.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/94845209747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9ba5fff-6dce-41ea-a9fc-1ab7fc839522/69870523379.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ac562c-4390-4852-8e9f-e9104d58e83e/73919134926.pdfIn PDF document text

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