Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a566ec0e9f3946a…

MALICIOUS

PDF

74.0 KB Created: 2020-11-25 14:11:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 24d77e22112405d972557c8183b10f70 SHA-1: d0a7131d6e7a73d6853e6dd28efa464db8125e60 SHA-256: 3a566ec0e9f3946aeba559c8941cd5c284c7d5b9d9b163d5f54fb5f88836dc30
244 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services and redirector domains. The heuristic firings indicate it is a malicious redirector and a link farm designed to distribute content, likely for phishing or malware. The ClamAV detection and ML classifier further support its malicious nature. No scripts were extracted, but the embedded links are the primary vector for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/strik?utm_term=8-2+the+pythagorean+theorem+and+its+converse+answers In PDF document text
    • https://xoragawamu.weebly.com/uploads/1/3/4/6/134666694/c1ebfe1a3c.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/vimoritadivararokuref.pdfIn PDF document text
    • https://norigawe.weebly.com/uploads/1/3/3/9/133988483/dodikagisavizo_webunusupok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5f9d6d56ef7dd.pdfIn PDF document text
    • https://femekeviwafuga.weebly.com/uploads/1/3/4/3/134345727/0fe64ad055be1d8.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/business_finance_exam_questions_and_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402737/normal_5f9a8d2a2174a.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/mufaletodopo-kamuzaximawep-xefuni-borirade.pdfIn PDF document text
    • https://taxufizewafodo.weebly.com/uploads/1/3/4/4/134477277/gulavidijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490127/normal_5fb62cbcebd52.pdfIn PDF document text
    • https://wibanakipose.weebly.com/uploads/1/3/4/3/134361509/3f5562abe.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/c70267bb-89b6-48cf-b62c-f82be7763119/93365515325.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1587647-3131-4a38-bf31-04a426f46588/ifrit_hard_tank_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed57e20-bb6c-4b3e-ba21-56d8a9208ba8/easiest_government_contracts_to_win.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71355a84-0cc2-4045-aedb-c826b3679a79/kusatepiniwibekebumopupo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC754 5972 bytes
SHA-256: eb8ef61bfa0b655840d7f241d91bd8db97ead4be84867738b4aa8bd21f202ca1
font_01_sfnt_off0000db9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9B 12500 bytes
SHA-256: 0140f62a5e3f60902f5e06a402435384530431ce4cf89688321179de29cfa337
font_02_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 16148 bytes
SHA-256: 43dd7310e986e37c0562d6efd2a67b6291a0d41fa892ecd43b306c3e7231f7b7