Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4a697423889881…

MALICIOUS

PDF

74.8 KB Created: 2020-12-27 20:18:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ad7934ffd63faa53f749dd5fbcd0df4f SHA-1: 87b6f34b21a5f7f350c51252be1d1936fabf34c8 SHA-256: 8e4a6974238898815e274d8c5fc02a358d876e2a92659f714b4d565cffd2e403
194 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically identified as a redirector for phishing or malware distribution. The ClamAV detection and ML classifier further support its malicious nature. The presence of a redirector URL strongly suggests an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/123?utm_term=corporate+express+template+ceg03208 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409096/normal_5f9e730e0e4e3.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/3651505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_5fe4f10cc99c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462341/normal_5fcd9f90a91dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_5fbee8041ab39.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/jeH1qig/snow_bros_4_mame_rom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fc96c513d759.pdfIn PDF document text
    • https://xipesefilugupab.weebly.com/uploads/1/3/0/7/130740566/6007023.pdfIn PDF document text
    • https://cdn.sqhk.co/nivuduful/BYYjhgr/schneider_altivar_312.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa080bd-5c0f-4ef8-9221-8a67b8227e87/43766234339.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/hidekaz_himaruya_blog.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/1984_macintosh_commercial_analysis_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/rental_agreement_form.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_off0000e449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE449 5860 bytes
SHA-256: e8887b70727f1a34657586d52ab66826c22bcd367882e72936d44ac339631a12
font_01_sfnt_off0000f81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 11368 bytes
SHA-256: 4c5896b502350ade6d7e1d48f70fe9152e16c4ac817062419a11ee3abbf6f703