Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b268e3dae45fd14…

MALICIOUS

PDF

83.7 KB Created: 2021-03-12 11:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2849eba7ed645e4d7a3a8ff8dddb94e8 SHA-1: 012815c212205c2c3f6aae1ff26f581119f02443 SHA-256: 7b268e3dae45fd143a9dc47594d9049f2aef2fc13edd34bda7ec52995f0df070
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The presence of a URL with a 'utm_term' parameter further supports a phishing or scam-related lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/123?utm_term=beamer+theme+madrid PDF link annotation
    • https://cdn.sqhk.co/bajowekununa/dgiHigA/fleet_command_star_trek_pc.pdfIn PDF document text
    • http://kupivse.xyz/graphic_design_training_in_suratkl3ke.pdfIn PDF document text
    • http://jakartapro.xyz/46640522064rda4m.pdfIn PDF document text
    • http://birjand.design/puttin_on_the_ritz_free_sheet_musicyvg4s.pdfIn PDF document text
    • http://afracheat7.xyz/accounting_information_systems_romney_14th_edition8rarp.pdfIn PDF document text
    • http://salopkisa.website/xufurufiwejozogipuww1yb.pdfIn PDF document text
    • https://cdn.sqhk.co/simixejazir/iXijjbh/marovex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_040a1608e96b462eb3e3f4e3ad5fc409.pdf?index=trueIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_9aae829300b94139862104741fe47b79.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1ea2a8e-2c34-4b55-9faa-6f203607f99d/20295492106.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/b_tech_computer_science_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a1a5ae-bc20-4b3e-ad68-bec15aeeb0a0/90628552643.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/fortinet_firewall_300d_configuration_guide.pdfIn PDF document text
    • https://00407fa8-a9ef-4b78-9bbe-46147fc8acf6.filesusr.com/ugd/5ecadc_9b0c1c96d6a44fae977ca08edb3dac48.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b838d363-0ae6-49a4-afe6-45f216857c24/hp_1497_motherboard_drivers.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/padagetujajepakakenekibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a7b7398-f3aa-4f2c-8609-a437320c63f1/rozise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fc3036c-2b42-4b34-b9a9-4144a7c83668/31038952640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5789b936-41f2-45ee-82c0-c3273a96c3c2/is_there_a_reset_button_on_a_sylvania_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/agreement_termination_letter_word_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/17477297207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36efb22f-b88f-4fbd-810a-ba8255cf3ced/project_management_excel_sheet_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a9f9daf-7126-41eb-9ebb-c24afecbf151/is_flipping_houses_still_profitable_2020.pdfIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_b7b510cf1fe24e51b2df93cb77c991ba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaf435b-2018-4a3c-b5e1-e812dce0c28a/contract_law_cases_australia_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db1c1659-2744-4a57-a298-664d5637ac32/how_do_i_file_a_better_business_bureau_complaint.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_off000107cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 4904 bytes
SHA-256: 416c799c1e258760c5e07aaed03e907adb7081aa6fd4b31e664a990001821bfd
font_01_sfnt_off00011848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11848 12104 bytes
SHA-256: 0e350c86608254a2e8e51c7d243e61bdabe826296069419f2d2c882030f83345