Malicious PDF — malware analysis report

Static analysis result for SHA-256 6022dc8e757019eb…

MALICIOUS

PDF

86.2 KB Created: 2021-03-14 05:51:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 161c3db73cd77f23258d890c6e14541f SHA-1: d95d1de7e20fa068596cc33c036d21703f76def7 SHA-256: 6022dc8e757019ebf3b02716c8c68c98ee3d273124523c91bfe676786ae9d1cb
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF SEO Link Farm', pointing to other PDF files. One of these links, 'https://leonvi.ru/strik?utm_term=canon+rebel+xti+zoom+lens', is suspicious and likely leads to malicious content or further redirection. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a phishing or trojanized document.

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://leonvi.ru/strik?utm_term=canon+rebel+xti+zoom+lens PDF link annotation
    • http://wabowiwajej.iblogger.org/different_types_of_sentence_starters.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/jefazaxal/praying_for_enemies_to_die.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/refirokupolew.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/3286854824.pdfIn PDF document text
    • https://db6d201d-bdff-4648-9982-d9cfaac7639e.filesusr.com/ugd/98857b_ad4b76ae192746a8b56dac82c2157f9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bubeto/55478649332.pdfIn PDF document text
    • http://zilazop.rf.gd/civil_engineering_building_construction_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/tafomuxodoratowiteperuku.pdfIn PDF document text
    • http://nekogepi.epizy.com/actors_cv_template_uk.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_37f6600390bc411289a4b9dca318e372.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/four_times_tables_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/virtualbox_android_x86_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/navien_tankless_water_heater_operation_manual.pdfIn PDF document text
    • http://rubaporejolo.rf.gd/army_cadet_force_uniform_regulations.pdfIn PDF document text
    • http://toxasetakibo.rf.gd/cules_son_los_beneficios_de_participar_en_la_escuela.pdfIn PDF document text
    • http://gojanoren.rf.gd/44204383995.pdfIn PDF document text
    • https://9e2bb560-353e-4f5d-a08b-1363560edab4.filesusr.com/ugd/6c032c_c51a6c9df24f41c9954d9315db6f5a98.pdf?index=trueIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_22955c7bcae84fbfa03a7fad28f9bac7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/67740964969.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_off000114b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B1 4992 bytes
SHA-256: 7fba0b02904158a2c1541e7404429e32c7e09ee92751441672c6a7ed7602b0b2
font_01_sfnt_off00012599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12599 11296 bytes
SHA-256: 2c6ca971391f398aff0b328f24c57ad9cb77c605af7a7c9bd66e98ce87b10f83

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