Malicious PDF — malware analysis report

Static analysis result for SHA-256 4865a717f50f41d3…

MALICIOUS

PDF

77.6 KB Created: 2021-03-17 21:48:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2960737583b9b50a2e4e0a8f0fe78c3d SHA-1: a7551f4ffd982e7fe9d824e811fd7c7edd616119 SHA-256: 4865a717f50f41d38eb7a0b54396b77f54601b2e7e8df2f2dac38de2de011620
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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 0.9997

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=how+to+use+the+fluke+1507+insulation+tester PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381083/normal_60329fc8d2835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464297/normal_601ec4a2bcb6a.pdfIn PDF document text
    • http://idealica-co.site/is_starbucks_skinny_vanilla_latte_sugar_freepinjn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_6000b94657000.pdfIn PDF document text
    • http://falupopakiwowe.22web.org/keyboard_shortcut_to_maximise_all_windows.pdfIn PDF document text
    • http://itverys.space/airbrushing_for_beginners54r9x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_60116ebe00638.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/jodabiladezot/kazoo_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/application_form_sample.pdfIn PDF document text
    • https://438e95ed-c264-4db5-88d3-1a9ca8b91b86.filesusr.com/ugd/733c1f_e9cd15751a57419ca986f1e2cba9e42b.pdf?index=trueIn PDF document text
    • http://woxikajir.myartsonline.com/tbm_tunnel_boring_machine.pdfIn PDF document text
    • http://fukutinupamebo.rf.gd/81035252692.pdfIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_b9fc2c58defd4637b65cd72052c6830a.pdf?index=trueIn PDF document text
    • https://2b81f3f0-3f46-42ff-87a7-5865dd96cd3c.filesusr.com/ugd/fb41f9_9612dca55ce647de99eb8e5a2c06615f.pdf?index=trueIn PDF document text
    • http://kesugoda.rf.gd/noxaduroxasonuxule.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/how_does_a_polaris_backup_valve_work.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/vw_dune_buggy_wiring_harness_diagram.pdfIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_a1685b3528274ad28066c87dc8494ed0.pdf?index=trueIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_1ccddc3430984da387ec9273e88593ed.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purufiz/lives_of_peasants_in_the_middle_ages.pdfIn PDF document text
    • http://telusomabufa.onlinewebshop.net/curso_de_ingles_basico.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_off0000e31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31E 5372 bytes
SHA-256: 7a15b9907e4f703acb1a1e355df7fb8df2822e78e7fefa3827502bcaac0b0933
font_01_sfnt_off0000f583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 22224 bytes
SHA-256: c2cc33d126f321348036139d6b59899f50c91953a68c03f56b05f9d2fa0c8fda

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