Malicious PDF — malware analysis report

Static analysis result for SHA-256 53c4fbf3891a4b24…

MALICIOUS

PDF

82.1 KB Created: 2021-04-16 19:14:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd3262607031be3a46197c8d3cfe686a SHA-1: 910f37eb329726b87884cb76a08d0d0920b6bd06 SHA-256: 53c4fbf3891a4b24e43131d7d8ef99ab112948a4223c9c115f11c032b1b0528a
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a ClickFix paste-and-run lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://druttle.ru/strik?utm_term=how+to+fix+jbl+flip+3+no+sound PDF link annotation
    • https://cdn.sqhk.co/mopewedote/gehhUhe/wallpaper_ben_10_omniverse.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/china_visa_application_form_covai6nx8.pdfIn PDF document text
    • http://coolstudent.space/56041846276rrs7m.pdfIn PDF document text
    • https://cdn.sqhk.co/pumevigatare/dhczTia/29578402679.pdfIn PDF document text
    • http://jevakogubosu.22web.org/ctet_2019_application_form_date.pdfIn PDF document text
    • http://savadaqwe.space/14505870251bxwtj.pdfIn PDF document text
    • http://discovljzg.fun/gavejamofebagis0fgif.pdfIn PDF document text
    • http://durorazi.22web.org/hematology_lab_tests.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/mawesenasijoser/pedudip.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/chennai_express_full_movie_720p_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/msc_mathematical_physics_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26cb240e-7e0c-450b-840b-ecb1d5830918/kajokelotugiro.pdfIn PDF document text
    • http://givemuzod.epizy.com/ramunotaxakomojejune.pdfIn PDF document text
    • http://saziwujezad.epizy.com/plymouth_argyle_football_ground_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/arhat_vandana_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/the_hobbit_book_summary_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/927134ea-148e-474f-9b48-d1110fc3eb10/how_to_work_in_the_music_industry_reddit.pdfIn PDF document text
    • http://rujemivegelap.epizy.com/salmos_apocrifos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92acbcc5-0df5-4c2e-ab7d-66f590723848/16389109070.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/redasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca759c36-d20c-4a15-adda-b9af5d8b1dc1/where_can_i_buy_paper_shredder_oil.pdfIn PDF document text
    • https://s3.amazonaws.com/mivokozibu/24731081262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef9d37b-571c-4db1-a4dd-74f2e1652e45/jovilo.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_off0000f9c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C4 5232 bytes
SHA-256: 2089648e6bcde20641fc05b0cb150c845f921ca905a6b930bbbc4c46fe275c9b
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00011444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11444 11288 bytes
SHA-256: ba891538ea87ec097b6986a36556f7c1ff8405c6916e8093d31ac521a4d1fd5f

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