Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0d162632de330b…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 15:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f7b39d18a9caadced3c0ef574ce39882 SHA-1: 5114bf10bfa1c9f6dc8d7a777d715b4fa4aed658 SHA-256: 4a0d162632de330bacdb6e7312d5268d6f5c67208330090b1ee69e2e936e6b63
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests it's part of a larger distribution network. While no scripts were explicitly extracted, the PDF structure and extensive URL usage are indicative of a malicious document designed to lead users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://pelibifir.ru/wix?keyword=permutation+or+combination+worksheet+answer+key PDF link annotation
    • http://kanobukomovis.iblogger.org/3889946995.pdfIn PDF document text
    • http://bovizanaranofo.22web.org/international_accounting_standards_40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_60176731d5141.pdfIn PDF document text
    • https://manujemupofux.weebly.com/uploads/1/3/0/7/130738512/6ca159a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377391/normal_605615e261a96.pdfIn PDF document text
    • https://walowopus.weebly.com/uploads/1/3/5/2/135295279/xujavisumerogajofan.pdfIn PDF document text
    • https://bazusatibewin.weebly.com/uploads/1/3/4/3/134374280/zamivuligelaluje.pdfIn PDF document text
    • http://nunupefaz.iblogger.org/46088115608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://papasebaxot.rf.gd/latest_current_affairs_in_english_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/fagobopidozugibapigidetix.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/runiseko.pdfIn PDF document text
    • http://xetoluwe.epizy.com/how_do_i_program_my_xfinity_x1_remote_to_my_samsung_tv.pdfIn PDF document text
    • http://magetamuwunaze.rf.gd/why_is_my_kenmore_sewing_machine_jamming.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/community_service_sheet_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/72631749339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d624ce-d562-452d-a519-4b0ef7741246/collins_the_language_of_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe6a7c8-a457-4a3c-9fa7-8255fe92adcd/79591044449.pdfIn PDF document text
    • http://madepug.rf.gd/mudivunifidokefoboxizogu.pdfIn PDF document text
    • http://rivagajogitow.epizy.com/how_to_change_oil_in_yard_machine_snowblower.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_off0000eb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB85 5408 bytes
SHA-256: 52136debaf73dc8d0fbfaeb4034185bd734b1b88e27aa18dad3aeb9cbbe9d9ae
font_01_sfnt_off0000fdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCF 11232 bytes
SHA-256: e3901db3dd92369bfbeb695295a83c61544f4c0ec275e7ec1cb4fe7d85c34b91