Malicious PDF — malware analysis report

Static analysis result for SHA-256 4889ae4582bb7115…

MALICIOUS

PDF

84.2 KB Created: 2021-04-03 06:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 4837dffe55cad888a82149b051c2043d SHA-1: 2a2f406b340956f910359f8d99c189e93f85a757 SHA-256: 4889ae4582bb7115c07e61b61a54022b8469cd847e1c8ddee45c519c48c8bd26
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to coffee makers, directing the user to the external URL. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

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://jacksth.ru/strik?utm_term=what+is+the+best+k+cup+combo+coffee+maker PDF link annotation
    • http://xedijama.getenjoyment.net/jewawigelirose.pdfIn PDF document text
    • https://cdn.sqhk.co/gobajejuz/Zidhgzf/digi_birthday_reward_2020.pdfIn PDF document text
    • http://juriravi.iblogger.org/bible_study_lessons_outlines.pdfIn PDF document text
    • http://mejumafegebameg.mygamesonline.org/catecismo_da_igreja_catlica_livro.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxoporerom/Fjdicji/apple_music_student_discount_high_school.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/73281100018.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/business_information_system_free_download.pdfIn PDF document text
    • http://zuxuvikewi.sportsontheweb.net/after_the_love_has_gone_bass.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tokudapele/job_offer_rejection_email_template.pdfIn PDF document text
    • http://ledufowi.myartsonline.com/28051420510.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/xifuzew.pdfIn PDF document text
    • http://neketepa.myartsonline.com/betrayal_in_the_city_book.pdfIn PDF document text
    • http://zumepule.rf.gd/wordpress_blog_templates_2018.pdfIn PDF document text
    • http://wabamuvakotobu.epizy.com/55600917080.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/guided_reading_activity_2-_1.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/what_is_the_theme_of_marin_in_the_house_on_mango_street.pdfIn PDF document text
    • http://gamugeko.rf.gd/jamosuposetelodilosik.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/pumizewi.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/85770710737.pdfIn PDF document text
    • http://tinuzutajalik.epizy.com/how_to_write_summary_for_book.pdfIn PDF document text
    • http://laxolagodofomug.onlinewebshop.net/bahishti_zewar_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/gaxusomatiginiwomodolez.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/41462513554.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_off0000fcca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCA 5216 bytes
SHA-256: ed1c4aaf4a34314dc9775bd684128d6cdbd8474ff43f544416e477e42d39454f
font_01_sfnt_off00010e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E8D 10728 bytes
SHA-256: 180b88d515da664d6b2954737f713fba2824dfe17ec4045e0eff077bbd322143
font_02_sfnt_off000132f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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