Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fad4e312a6da9cf…

MALICIOUS

PDF

80.3 KB Created: 2021-04-06 19:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6409ecf7d919561ea79e72a9b9ebe743 SHA-1: e9505514bf8b0bbf2b6c80d5c3085f2ad1a0a91c SHA-256: 8fad4e312a6da9cfd6309e383e7e6d203956e9e89c477e59fd3a5f0ab0e6cbe0
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The presence of the term 'chronogramme definition informatique' in the document body and a related URL suggests a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/123?utm_term=chronogramme+definition+informatique PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481825/normal_605ad0bf471f6.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/biblia_de_estudio_pentecostal_gratis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372376/normal_5ff1dc00b8d7c.pdfIn PDF document text
    • https://cdn.sqhk.co/sirobuse/jhig0ha/27105257230.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ajfjdYQ/real_baseball_3d_mod_apk_revdl.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/gejuwudamefobe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5fdd0578e9fb4.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/jhhjrOM/86931905970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_60598c024093a.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/yard_machine_snow_blower_5.5_hp_22_inch_oil_change.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/TEidhiM/creator_academy_course_exam_answers.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/86027989151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5fd901af216ad.pdfIn PDF document text
    • https://cdn.sqhk.co/zetarizelub/iRihajC/reporting_kaplan_meier_results.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/gc8ijea/71422475341.pdfIn PDF document text
    • https://cdn.sqhk.co/wagejino/haheuyL/winegumimupodugom.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/air_force_ones_high_top_womens.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/where_are_keurigs_on_sale.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/4dc7e20b-482c-462a-b9ba-a5c8ff3aafa7/kasuzasufoxaputopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2eab0d-8389-4d68-95d1-89a71ad179b1/bissell_quicksteamer_powerbrush_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162623fb-d5d8-447e-a788-9527c65a829b/the_makers_diet_revolution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f4a0e24-5b29-4e52-a4e9-340b521ae444/bepowadajunavo.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_off0000fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA04 5140 bytes
SHA-256: 5fff7c91d2eaf06122c3c2871426198f60d680c4ddfa63a3d796283539428326
font_01_sfnt_off00010b47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B47 12216 bytes
SHA-256: b8a2ddb86d3ceea2c775b2ac7d7b1e3b094d0f208edbbc38f36506cf03dc1175

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