Malicious PDF — malware analysis report

Static analysis result for SHA-256 96022148dbbf17ca…

MALICIOUS

PDF

86.0 KB Created: 2021-03-18 18:37:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: fb9d585faa495341f5addf3800035a4a SHA-1: d74febb507a9420d5d5240b91ef7aac41ed8bd63 SHA-256: 96022148dbbf17ca1d4001595e2fdf9913bbe18b1a2200751bfd72f9887d763f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=alfonso+reyes+cuentos+pdf PDF link annotation
    • http://modozadubop.mywebcommunity.org/73876259902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_60469f5caca22.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/zalewovixerozorawowumi.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/75389113170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388157/normal_600bbfb4b8824.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379859/normal_5fccf7ce3ecf6.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/thon_case_kemper_profiler_stage.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/computer_science_lecturer_books_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_603db88d985b0.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/xibemibexedebefujati.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/ccie_routing_and_switching_study_guide.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/using_commas_worksheet_answer_key.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/begijufadi/97283077643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38c48756-2a7f-4159-9a35-f4277d12d39c/huckleberry_finn_film_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9466ed19-fe35-4eb7-b5c5-318c2aa88061/stock_market_crash_2020_covid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6275d2c-de45-485a-8952-a346f2e65576/ruluremipisezupogafe.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/67213595449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19f63aa-7c9a-496d-9388-5db185c9ba3a/36194118779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e924b10-727e-402a-98f4-0be3d88ea244/jeep_grand_cherokee_diesel_problems_2014.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/bls_provider_manual_2020_free_aha.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8a98003-7c63-42dd-8826-c3f20d65b621/8113668029.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/phpstorm_reformat_code_options.pdfIn PDF document text
    • http://vawanumezal.onlinewebshop.net/ngo_bylaws_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db54be39-7e33-4326-95ae-73c9f703ecfd/78122925938.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_off00010f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F99 5032 bytes
SHA-256: eefb67c3cac0262be9bb17a77561d88a274ade1af991ac83931285dc54598387
font_01_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 12416 bytes
SHA-256: a4c8d270f85c068d9a2655698e32635f2e720f7f28dcdb7bf194567a98ebdaa5