Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9a98930b7e0262…

MALICIOUS

PDF

84.7 KB Created: 2021-03-19 11:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dde58f7d31a5881a33c73b606ca89882 SHA-1: 9da240aab026f18fbcd5f9e89f259ddc8c9c427f SHA-256: be9a98930b7e0262da37d4e56a610662614f0c2bc49ce4b038d7966e1b8309ef
156 Risk Score

Malware Insights

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

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 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xajibur.ru/wix?keyword=paisd.org+learning+apps PDF link annotation
    • http://kuzexamipapoxip.medianewsonline.com/how_to_remove_maintenance_light_on_honda_civic_2002.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/questions_to_ask_a_builder_when_building_a_custom_home.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/toguvaju/76048251808.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_6c1ddc6fda5242ff9999f8199df10ca6.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_5511894d84144dae99c0ed5cf91a7e7a.pdf?index=trueIn PDF document text
    • https://8eefcaf3-52f5-4123-8be5-b1f0aaeea45e.filesusr.com/ugd/1d3654_8b299245eb6e433cab29e00500ae4a39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/89239195754.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/month_end_closing_process_in_sap.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/interview_questions_and_answers_for_freshers_c.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/alphabet_letter_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/comfort_zone_infrared_quartz_heater_manual.pdfIn PDF document text
    • http://kovawasokagi.epizy.com/world_cup_cricket_2019_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/xapowovowozozefik.pdfIn PDF document text
    • https://6b52f5a6-db44-4d3e-8337-ab33c729cb13.filesusr.com/ugd/f4de5e_8f0f9b501248429599d24e5c86ff2518.pdf?index=trueIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_07fd44057a544dc8afb09f9837f24390.pdf?index=trueIn PDF document text
    • http://pususarejopo.epizy.com/vadasavodadadapex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10000 2960 bytes
SHA-256: 4c688c0676da4c9c3f1d636d29496b85ed1f90b4285ee9b780884cc7de0e34ac
font_01_sfnt_off00010a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A70 5160 bytes
SHA-256: 36f77966d4157765ad41ca189acf3ecc2756495992529dcc77437ccf1914e27f
font_02_sfnt_off00011c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C10 12072 bytes
SHA-256: 88594b52164a9aa98a22b2c3653a7c8b76516847301b4d732c26bb9b9fb3ca99

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