Malicious PDF — malware analysis report

Static analysis result for SHA-256 8023286e43268c2d…

MALICIOUS

PDF

61.5 KB Created: 2020-11-19 07:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 226d75b1174ea05a4f1d06423131e2c2 SHA-1: 5d2cf91b10967829ffd81d0fa6bc82fb11f83bb0 SHA-256: 8023286e43268c2d26cabfb510008fdb908668ee7a7342b2101f7cf877cc710b
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure. The presence of numerous external links, many hosted on disposable domains, strongly suggests a phishing or scam attempt designed to redirect users to malicious sites. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/aws?utm_term=guardian+rugby+team+guide In PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/7254159.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/gezoj-laritokigepez-fixapozigubim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5fa57cea07639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5fb4cb7c18d17.pdfIn PDF document text
    • https://fowalafe.weebly.com/uploads/1/3/4/7/134722097/nasofenojuzenan_nivowumi_gobosizizeg_wufaz.pdfIn PDF document text
    • https://kojemugolipoxo.weebly.com/uploads/1/3/4/7/134729864/guluniguvikedubuleg.pdfIn PDF document text
    • https://lufugidot.weebly.com/uploads/1/3/4/8/134848642/56749dd5e.pdfIn PDF document text
    • https://virataxutepubom.weebly.com/uploads/1/3/0/8/130874282/50411152885.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/1563a6d6-4d98-423d-9c15-530d99ee81a9/2176884429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db20c051-56ea-4401-87e7-86a985ee3f37/1645472922.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b709204-7d1c-406a-b5d9-fecf820cad02/62829892303.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_off0000b5e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E2 5208 bytes
SHA-256: 63bf54b681a52a1e7868c2c7b1b0fd3b9fe36f43636606093e5884e99cb188a1
font_01_sfnt_off0000c78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78D 10352 bytes
SHA-256: b89f6840173228491e943eea052395a66c0d2e93c5aedeb2334220cde1f921de

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