Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5fcf9987aab362…

MALICIOUS

PDF

76.5 KB Created: 2021-06-08 00:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6026f4be406d67e0c6f80f77e75ce089 SHA-1: ebe1ef0decc4c542073125985e78f66dc5f91023 SHA-256: 1b5fcf9987aab36292479f7f5a80306e7d1bc62f8dfb91635bd9cc227bf71f24
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a gambling-related site, suggesting a phishing or scam attempt. The PDF structure and heuristics indicate it's part of a link farm, further supporting its use in malicious campaigns.

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 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://nomylo.ru/pbw?utm_term=igt+slot+machine+not+working PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogekinovag.pbworks.com/f/download_nfs_most_wanted_highly_compressed_psp.pdfIn PDF document text
    • http://lifabukis.pbworks.com/w/file/fetch/144805668/is_supply_chain_management_a_good_career.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50bccec-44da-4238-9f29-a71f98cef640/parenting_from_the_inside_out_worksheets.pdfIn PDF document text
    • http://zipiwume.pbworks.com/f/how_to_get_gold_nfs_no_limits.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144819885/what_is_career_assessment_counselling_services.pdfIn PDF document text
    • http://jolowajuwijo.pbworks.com/w/file/fetch/144522378/ppp_loan_forgiveness_application_form_3508s_revised_january_19_2021.pdfIn PDF document text
    • http://vafobotigef.pbworks.com/w/file/fetch/144572238/migonanelobewuliporidul.pdfIn PDF document text
    • http://malamojozag.pbworks.com/w/file/fetch/144577569/gba_roms_android_pokemon_heartgold.pdfIn PDF document text
    • http://zewalar.pbworks.com/w/file/fetch/144446859/ultipro_timebase_clock_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8df1996-44c2-4dff-adbf-f4742c2dae03/xipusowutaxozajazimod.pdfIn PDF document text
    • http://lewomirat.pbworks.com/w/file/fetch/144813024/cars_fast_as_lightning_mod_apk_new_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69e4c021-2ed1-4ad7-8206-8db3183eac0f/dixufibivifewasamikuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649aa49b-058a-4256-b88d-913da4ed685c/surarimawitagofovuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4619c2d4-afdc-4599-ac25-5dc1928e60b7/47135207080.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144703149/chanel_boy_bag_size_chart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/755dd6cb-7cca-4509-8a33-a4ba663238b3/58679508421.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db9d084d-60eb-4753-b233-985b869fbd7d/f_distribution_table_0.05.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2475ab9c-8875-4845-99fa-2e6e038e69c5/21483015212.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/w/file/fetch/144413559/27295611233.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_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 5308 bytes
SHA-256: ab17f24761833e8a3ff38461f32cc31a19022453d0cd3e45ffff476be2859ccb
font_01_sfnt_off0000fff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF1 10404 bytes
SHA-256: 94f398bd13859a502e8947334c32f0e6ef0aaf5d3c5cd359d018f3b3f6a71815

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