Malicious PDF — malware analysis report

Static analysis result for SHA-256 6669b08fb0ffc99f…

MALICIOUS

PDF

75.0 KB Created: 2021-01-16 18:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4a5d62742808b3b13dee1f138fa1e370 SHA-1: 3e4f5c3d4f4666d7345616d0f032f6b0aeb70319 SHA-256: 6669b08fb0ffc99f4dddbe9657db0073c617d945881f993c2ddf132093c331ae
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains links to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=uni+posca+paint+pens+on+glass In PDF document text
    • https://site-1199632.mozfiles.com/files/1199632/kezovires.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fe8aea273692.pdfIn PDF document text
    • https://site-1168354.mozfiles.com/files/1168354/19714792492.pdfIn PDF document text
    • https://site-1230881.mozfiles.com/files/1230881/cloud_gaming_services_that_support_steam.pdfIn PDF document text
    • https://site-1168079.mozfiles.com/files/1168079/38834199937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fa3bec91a883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378623/normal_6002ec7dc7c5a.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/gupojakami/cbse_marksheet_verification_process.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/zanefotakuzaxibix.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/9879378391.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/66405471956.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/69698701500.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/bollywood_songs_free_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/52756374751.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/lancashire_insurance_company_uk_ltd_annual_report.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_off0000e873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE873 4996 bytes
SHA-256: d7557e57e543a941ae9e3a49da43c25181feba87fb9bb4bfece1ad322496e17b
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 10532 bytes
SHA-256: b6a62a8bbdd03510c26ca677c3a845e21de0c23b8b8d236deea29456bd27603d

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