Malicious PDF — malware analysis report

Static analysis result for SHA-256 f09920efddb1c63f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 01:18:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: acf8f0bb45e1d4db615c749b637a51a6 SHA-1: da14cb4725d90f761b4a04eaa5b08aac05a5d873 SHA-256: f09920efddb1c63f1e24c2ed3ff8fd4326e05cc578341b4efd5a1af43d4a6f82
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/aws?utm_term=4th+grade+math+worksheets+multiplication+and+division+word+problems PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407327/normal_6001a2a81918b.pdfIn PDF document text
    • http://richmaya.site/starry_night_ragnarok_mobile_answersm6im.pdfIn PDF document text
    • http://zdsshop.top/preschool_behavior_plan_templatekx5uf.pdfIn PDF document text
    • http://help-ruleviolation.com/que_es_analisis_de_sistemas_de_informacion9d1ye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451018/normal_600a2132d0f93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418786/normal_602b46aa9d9c6.pdfIn PDF document text
    • http://kartaidatodemeleri.com/java_formatter_code_styleik8mt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_601dce622f929.pdfIn PDF document text
    • http://kapuwapow.iblogger.org/learn_python_in_one_day_and_learn_it_well_free.pdfIn PDF document text
    • http://mafuditovu.iblogger.org/mojevanemebo.pdfIn PDF document text
    • http://purpless.vip/what_is_the_definition_of_system-2_thinkingvwdvh.pdfIn PDF document text
    • http://mybiol.site/39606643669rxe97.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/tajuxoxizaluzokusu.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/retokedodezudo.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/magazine_template_png.pdfIn PDF document text
    • http://lesexugisitu.rf.gd/nationalism_in_europe_class_10_mcq_questions_with_answers.pdfIn PDF document text
    • http://gametusepezuka.rf.gd/kolububixoresonematakabat.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/kaguzejulopalav.pdfIn PDF document text
    • http://xopezolesuvobut.rf.gd/rpg_maker_vx_ace_scripts_download.pdfIn PDF document text
    • http://mezotavexojo.rf.gd/27610257303.pdfIn PDF document text
    • http://figaniver.epizy.com/cubic_and_reciprocal_graphs_worksheet.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_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 5836 bytes
SHA-256: 6268349ae733f080ca1e00ea933468f56370194305b33366a1a1b1eee5c330fe
font_01_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 10068 bytes
SHA-256: bfee4d4ba853c134ab96f63e4fa87b701337d1fd11c25b986ed458dcc7591617

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