Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1167253f1fd731c…

MALICIOUS

PDF

76.9 KB Created: 2021-02-25 22:10:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 55805adf7e4a38778766bc7e14d09088 SHA-1: 3c587f16d5a86584637976622ab90ef5a63f0fe5 SHA-256: e1167253f1fd731c4cecba44fa5a4f129db51caa18928a23a294a54ff728a5b1
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was identified as malicious by multiple heuristics, including critical alerts for malicious redirector links and a link farm. The file contains numerous embedded URLs, many of which point to potentially malicious redirectors or link farms designed to obscure the final destination. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves luring users through these links, likely for phishing or malware distribution.

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://yafferge.ru/123?utm_term=biblia+textual+3+edicion+pdf In PDF document text
    • https://gitakitopawal.weebly.com/uploads/1/3/5/3/135325500/e43f966b7.pdfIn PDF document text
    • http://zoo-taxi.site/whatsapp_apk_mirror_2._19._282ychh0.pdfIn PDF document text
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/6749986.pdfIn PDF document text
    • http://openchambre.xyz/58866983780dg1en.pdfIn PDF document text
    • https://xiramulume.weebly.com/uploads/1/3/2/6/132682542/2d3ad.pdfIn PDF document text
    • http://esagafow.fun/teacher.depaul.edu_reading_passagest7aey.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/7572778.pdfIn PDF document text
    • https://mitivowa.weebly.com/uploads/1/3/1/6/131607237/76f0e43e2d3.pdfIn PDF document text
    • http://physcoo.com/chicco_nextfit_zip_assemblygfihj.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/tiniruru/vidmate_ios_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/rufos.pdfIn PDF document text
    • https://s3.amazonaws.com/jujojomojemiz/ameloblastoma_plexiform_histology.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/kufovufo.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/84483854135.pdfIn PDF document text
    • http://dimonejoxu.rf.gd/muboja.pdfIn PDF document text
    • http://japorivexasore.epizy.com/ludumufidusapijulonad.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/lagumafoxalebif.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/namevijogarisiwukinifuket.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_off0000f08c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08C 5296 bytes
SHA-256: 5893d85a247eb068ef7db7d3c71615e0af501b16c99f8c97a4bb5cbf965f4c79
font_01_sfnt_off000102a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A7 9936 bytes
SHA-256: a61896f87d48dd071201f06174f8f5be4f24e87f87ec94f4fc561c85f033acf3

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