Malicious PDF — malware analysis report

Static analysis result for SHA-256 8877d1872a584b17…

MALICIOUS

PDF

86.6 KB Created: 2021-03-16 10:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4e70924a7056caa970126da9fd07cd15 SHA-1: 5c7bb5a70259c4035a476e9085e708a26d8aa94e SHA-256: 8877d1872a584b1708bb1a2e7243c28f7d043b3dbe363974eaaeadae78524b40
126 Risk Score

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://midufefew.ru/wix?keyword=1750+to+1800+fashion PDF link annotation
    • http://vozuzutiwajuzip.getenjoyment.net/el_pequeo_vampiro_pelicula_animada_completa.pdfIn PDF document text
    • http://kiwudaliditejo.iblogger.org/the_lady_or_the_tiger_summary_video.pdfIn PDF document text
    • http://nutristrike-shop.ru/maulana_rumi_masnavi_in_englishvpkph.pdfIn PDF document text
    • http://skout.tech/what_are_the_9_knowledge_areas_of_project_managementfa7ua.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/how_to_learn_all_programming_languages.pdfIn PDF document text
    • http://sexogovo.iblogger.org/javascript_file_formatter_online.pdfIn PDF document text
    • http://urott-hu.com/us_constitution_bill_of_rights_instituteeol74.pdfIn PDF document text
    • http://daimontimur.org/xixikemufafemerjq0f8.pdfIn PDF document text
    • http://zalalepora.iblogger.org/patarapenukesino.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://limoxukuk.atwebpages.com/3.5e_players_handbook.pdfIn PDF document text
    • http://wigagil.rf.gd/arbutus_slab_font_free.pdfIn PDF document text
    • http://bojuzafi.rf.gd/saucony_guide_9_mens_running_shoes_review.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_cb889bd370194fde912b2b1fbd6fee13.pdf?index=trueIn PDF document text
    • http://bajokekez.epizy.com/kavizorimukasatamolafuke.pdfIn PDF document text
    • http://fedununa.epizy.com/2016435848.pdfIn PDF document text
    • http://doxurisod.epizy.com/yamaha_moto_4_350_price.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_b250eb13e60a42dfa691663388016d96.pdf?index=trueIn PDF document text
    • https://8488b7ac-84bc-45ae-88ed-26841205fc59.filesusr.com/ugd/7cda3c_6dc6dd1afcbc433fa2e6bacf266ca4ef.pdf?index=trueIn PDF document text
    • http://gidatefasu.rf.gd/how_to_change_a_schlage_deadbolt_lock_code.pdfIn PDF document text
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_b4b6730fb6fb4ecd97ef678435788bb8.pdf?index=trueIn PDF document text
    • http://nodefojabotozij.rf.gd/glossary_of_environmental_science_terms.pdfIn PDF document text
    • http://dileginaduke.epizy.com/41123156442.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_off00011595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11595 5224 bytes
SHA-256: 56385334ba01fe3412e10baccd15ad3af3b74ea561563796345ab150f66f8ef4
font_01_sfnt_off00012771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12771 11412 bytes
SHA-256: 4167d243096b07fada032a36b448a7457e1093060608fb5786ded7f06515d14a

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