Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7c51b4f1132bb3…

MALICIOUS

PDF

79.0 KB Created: 2021-01-20 09:42:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a7fb5aa2ed57ead914a9d0b2f38ce7a7 SHA-1: 17b95b535a3127895cf856b9d836b84e5c503d33 SHA-256: 1b7c51b4f1132bb381bfd98081efed33625f5c8d0102f94dda0cfc4e24b85363
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains numerous external links, many of which point to redirectors designed to obscure the final destination. One prominent URL, 'https://leonvi.ru/123?utm_term=helene+cixous+the+laugh+of+the+medusa+pdf', is identified as an SEO redirector likely used for phishing or malware distribution. The presence of a large number of external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9412

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
  • 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
  • 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://leonvi.ru/123?utm_term=helene+cixous+the+laugh+of+the+medusa+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5fda6e7ba0732.pdfIn PDF document text
    • https://zegaturivelegob.weebly.com/uploads/1/3/1/4/131437779/zijijita_tisusekodo_basopi.pdfIn PDF document text
    • https://cdn.sqhk.co/pavetikedur/jwgfkij/13058646239.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418993/normal_6007c87ee2966.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473954/normal_5ff08e57a2820.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403429/normal_5fc9153fdfe90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f9d38f37bece.pdfIn PDF document text
    • https://cdn.sqhk.co/kagaxavog/hacXAjh/prestonplayz_youtube_roblox.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/zozotesufusu-duzogajirefijix-wirafomoza-fugizisavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453556/normal_5fa2e086993b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5faddf5c8df0b.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/fanemijofa-nilopuvuxu-gutapelobuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405195/normal_5fef46b5bd4fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446502/normal_5fcdc194765d0.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuzasana/ggejhMa/silver_cloud_tacoma_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/gPjhowS/car_simulator_veneno_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dorulusof/make_my_trip_flight_app.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/allianz_travel_insurance_doctor_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/definio_de_pesquisa_qualitativa_e_quantitativa.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/equifax_credit_report_email_address.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 5500 bytes
SHA-256: 75b4569084f236c527ea55f90532da841e9aea78f7ac045060d33a20fb0fe621

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