Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5e4741935cd3ff…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 22:51:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bd238f569827da81c751dd2e4b3570a8 SHA-1: b80f3554136b62d4c396979ac5caa2abfcab198a SHA-256: ad5e4741935cd3ff63ef1f42479cbf0351af5c5015614d43adc9c1da9a0cbefb
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://yafferge.ru/wix?keyword=europa+universalis+4+manual+cz In PDF document text
    • http://gavojutopubiri.getenjoyment.net/18490887817.pdfIn PDF document text
    • http://fafasun.iblogger.org/descargar_el_amor_en_los_tiempos_del_clera_pelcula_completa_latino.pdfIn PDF document text
    • http://zupowebuzozasap.iblogger.org/alicyclic_chemistry.pdfIn PDF document text
    • http://carbackseat.site/xutabubad6im1.pdfIn PDF document text
    • http://sweetmeet.online/49180480346u17g4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369784/normal_603d0a0e72db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_5fd34ed2259ac.pdfIn PDF document text
    • http://fakaripeti.xyz/noun_clauses_subjects_objects_and_complements_exercises33jx4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421767/normal_5fef01396c8ff.pdfIn PDF document text
    • http://jezizidolozoniw.22web.org/pokalorumatigaputikix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417653/normal_6027a22ca2871.pdfIn PDF document text
    • http://edalovert.xyz/76366795990ywdoy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xigoxusokumebu.rf.gd/63642155080.pdfIn PDF document text
    • http://lobulowigewimu.epizy.com/how_to_disassemble_maxtor_onetouch_4.pdfIn PDF document text
    • http://puxakuxuvon.epizy.com/cadbury_nigeria_plc_annual_report_2007.pdfIn PDF document text
    • http://xuvufajozurez.rf.gd/75147340715.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_e8028bcd41e54360a3f9307ef1e4204b.pdf?index=trueIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_75e1977b85dc4b049bcc0d0d1a89c246.pdf?index=trueIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_81fabb5c2c3f4c6e9ff50b29390db62f.pdf?index=trueIn PDF document text
    • http://fefadipif.rf.gd/keto_diet_recipes_free_app.pdfIn PDF document text
    • http://sikirubuguje.epizy.com/falcons_week_3_injury_report.pdfIn PDF document text
    • https://45e41439-46a4-4c97-84f0-155cfeda4cef.filesusr.com/ugd/9d7ad9_80c62d2b243e4d7b99f5181d82f9ef4d.pdf?index=trueIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_2edc26bb445f421abd1b1c1478306801.pdf?index=trueIn PDF document text
    • http://zikorizerijegiv.rf.gd/zegumaj.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/4557118344.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_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 5236 bytes
SHA-256: 8e910fcb2a3fd52c9c759d515a147d8cfdfaa27144e13213ede9c2b2644c7ea3
font_01_sfnt_off000105de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DE 11200 bytes
SHA-256: 5568159be61dbf20fa5e5031656b017fe7db6f595eb7ad739f32e4296f500382

Open this report in the interactive analyzer, or submit your own file for analysis.