Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bda9845f4e48c23…

MALICIOUS

PDF

77.3 KB Created: 2021-05-09 19:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 815d16e633b1740fedc713eea521fefe SHA-1: 5b5b4d79705c0201d402a813c75a5024631d28eb SHA-256: 2bda9845f4e48c23c52a9840b5200b5ff0332edecd60d34281148addba223694
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL designed to lure the user to a malicious website. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URL, 'https://nipisod.ru/strik?utm_term=how+to+start+a+simplicity+regent+riding+mower', is the primary indicator of malicious intent, likely serving as a phishing lure or a download redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=how+to+start+a+simplicity+regent+riding+mower PDF link annotation
    • http://zakomuxoza.getenjoyment.net/kujiramepufubunagit.pdfIn PDF document text
    • https://cdn.sqhk.co/vunebapenuj/v4gdMgd/bloons_adventure_time_td_steam_cheat_engine.pdfIn PDF document text
    • https://mexasazage.weebly.com/uploads/1/3/4/5/134513067/2470130.pdfIn PDF document text
    • https://cdn.sqhk.co/waxubisolo/hhcihFe/88171239582.pdfIn PDF document text
    • http://gufopitasuwo.22web.org/82464075379.pdfIn PDF document text
    • https://cdn.sqhk.co/buzivafulet/iZ6ifMA/mazefimagokexi.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/jdijHhc/long_acrylic_nails_meme.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/gzidAbN/digital_marketing_plan_for_real_estate_agents.pdfIn PDF document text
    • http://tamogulaganero.scienceontheweb.net/tratamento_asma_pediatria.pdfIn PDF document text
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/biwasomikutej_nujovolatasode_fafajutiriminus.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/dejevugux.pdfIn PDF document text
    • http://zujavok.22web.org/4765577590.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/68147740563.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/vexeliku/rental_agreement_contract_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/18165778886.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_2c126035de5c4ca6a66c2394f9744ee4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/89867033817.pdfIn PDF document text
    • http://jibitolokadidus.rf.gd/fundamentals_of_general_organic_and_biological_chemistry_6th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/37212626303.pdfIn PDF document text
    • http://bememikat.onlinewebshop.net/easy_grammar_worksheets.pdfIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_c4a253d5ccac44218d3ac993e4f778df.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mutirexa/what_is_one_purpose_of_an_essays_conclusion_paragraph.pdfIn PDF document text
    • http://fasufigosekuwuw.rf.gd/norm_macdonald_based_on_a_true_story.pdfIn PDF document text
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_9180459ad05d4fccbe50722db17c8099.pdf?index=trueIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_4d4a71174b684c7b98cd3169bbc63a5e.pdf?index=trueIn 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_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 5548 bytes
SHA-256: d2faa9896f8c39b29965de8a97dc90aa887a8944468fff3edd364956defdda4d
font_01_sfnt_off00010287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10287 10788 bytes
SHA-256: e7649a730924431e1151f4a0f933f402e9905f0d93960a1e652307eec58dd1c3

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