Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff1463761397e6b…

MALICIOUS

PDF

75.7 KB Created: 2021-03-23 18:15:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ae0a9b0c6b654bdb51e0f38dd69993fb SHA-1: 618a13bbd75b0673c28c6f800e8a01dbf99c3b95 SHA-256: 2ff1463761397e6be89a8c0fd260006b2bc0873b87f137dacd626b9a553b4c5f
126 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, pointing towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/123?utm_term=devexpress+report+designer+table PDF link annotation
    • http://nititozokepukam.22web.org/my_ford_explorer_wont_turn_on.pdfIn PDF document text
    • http://sogejovep.mypressonline.com/zusawugewogomutapirurapo.pdfIn PDF document text
    • http://nogurufegu.mygamesonline.org/17366179545.pdfIn PDF document text
    • http://teksalon.xyz/gegoko47ec.pdfIn PDF document text
    • http://ruroraratotu.66ghz.com/outlook_email_app_android.pdfIn PDF document text
    • http://lovemecompletely.com/html5_viewer_w3schoolsww7o3.pdfIn PDF document text
    • http://wewofif.scienceontheweb.net/22930936450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugunimekuxaf.epizy.com/back_end_web_development_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/curso_de_ingles_fisk_valor_da_mensalidade.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/barton_fink_movie.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/44589980183.pdfIn PDF document text
    • https://s3.amazonaws.com/nafamaragisek/ejemplos_de_memorando_en_ingls_y_espaol.pdfIn PDF document text
    • http://zuwipipulu.epizy.com/accounting_theory_and_practice_by_jawaharlal.pdfIn PDF document text
    • https://0f424234-9c27-4462-a606-4b2ccecf17d8.filesusr.com/ugd/b42a09_4f88e8d949714f659953320af00d7d1c.pdf?index=trueIn PDF document text
    • http://zawitonomabela.rf.gd/alcoholics_anonymous_big_book_dictionary.pdfIn PDF document text
    • http://xogonat.epizy.com/tumum.pdfIn PDF document text
    • http://masokijedeneda.epizy.com/janapu.pdfIn PDF document text
    • http://sufotef.rf.gd/how_much_does_ac_service_cost_at_valvoline.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/bodmas_sums.pdfIn PDF document text
    • http://lewizalejeso.rf.gd/56292790971.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_9f8bd4cd304149daad962f2ce597e15a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/69925066955.pdfIn PDF document text
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_0db6b30bcaaf4f39ae52ceb2e7d62847.pdf?index=trueIn PDF document text
    • http://zatutokoluk.epizy.com/16166035519.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_off0000e902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE902 5396 bytes
SHA-256: 8762678c39cdefcd7d3412103a9b3c50c785c1654f0938b8c2ec9fb36a80565f
font_01_sfnt_off0000fb71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB71 11212 bytes
SHA-256: 0099efcd49d05b2ff076569045819fa44a8617f7c52ffef816fcfee115fe3082

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