Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a62ee86dc315d88…

MALICIOUS

PDF

94.7 KB Created: 2021-03-24 19:44:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0341fb5b3faae626865147c80c5c715e SHA-1: 786620e577c0594f495ff1af258ddaf2bfa0e9b7 SHA-256: 9a62ee86dc315d8824d234821f8063c985d2978bc86e72072b60545a60d7f5b1
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a non-clustered link farm on disposable hosting, suggesting a malicious intent to redirect users. The presence of an embedded URL and the ClamAV detection as 'Pdf.Phishing.Trojan' further support a phishing or malicious redirection attack pattern. No scripts were extracted, but the overall structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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 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://maypoin.ru/123?utm_term=new+facebook+lite+java PDF link annotation
    • http://kepuxom.mypressonline.com/7368369427.pdfIn PDF document text
    • http://sadipize.scienceontheweb.net/doena_de_alzheimer_perfil_neuropsicologico_e_tratamento.pdfIn PDF document text
    • http://vemelaribox.getenjoyment.net/xamezupebepasotigud.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/66588a7f-8dd3-40cf-8a65-507bb510ca99/el_pollo_loco_keto_taco_shell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640bee9a-afad-4362-8c3c-2d47422b46fd/24606177529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a589915d-f709-4309-b92b-2c522909b8e1/how_to_install_bosch_slimline_integrated_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/el_prncipe_nicols_maquiavelo_resumen_por_captulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79ea839e-85dc-4bfb-b6dc-58411d2062be/can_you_get_an_extension_on_drivers_license_renewal.pdfIn PDF document text
    • https://0443db59-9f9d-4031-b786-8a5723798135.filesusr.com/ugd/ab62d6_450fc6a1e41141ed892b7728b31d98b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37768248-e9d1-422b-a297-c49c2db17ce0/zosazewuliretadimex.pdfIn PDF document text
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_123e792f1d36457389214f5d24f5ba6a.pdf?index=trueIn PDF document text
    • http://fuvuxejuv.myartsonline.com/makalah_bladder_training.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/define_bilinear_transformation_in_complex_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17945b6-fb5d-4ebb-99b0-152aceb29dc4/59089186882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1a059b7-38de-4755-8861-ae9dd6a06696/81369399926.pdfIn PDF document text
    • http://damowepoko.myartsonline.com/alteraciones_morfologicas_de_los_espermatozoides.pdfIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_3a317e465bce45aabc7f7b43a6fd2ed0.pdf?index=trueIn PDF document text
    • https://a8fdb364-3865-4521-a36b-e12f4de7752f.filesusr.com/ugd/e20637_8c33a25680454d46b1835b902d2ce1a1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ffce4c-542d-4ef7-a4ad-6ff35174f073/how_to_reboot_verifone_card_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/crystal_report_2005_runtime_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5be3890-a40b-475b-bf30-f6a9581ae7ab/international_bar_association_london_internship.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/51834625032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c16a7c-6c93-4cc3-a8f5-d11bb756a958/oyama_tro-110c_turbo_convection_oven_12_l_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19f2f20-6fd9-4352-964f-40621be22679/what_color_is_similar_to_phthalo_blue.pdfIn PDF document text
    • https://849bdae7-2456-4570-9e2a-fc769e7e49ad.filesusr.com/ugd/2074c9_9e02325b693d4a909ab5209d802543bd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef339d54-e322-4a8e-85d1-b01557514b8b/rebelin_de_la_granja_resumen_breve.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/lokefoxerele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5c65dd3-3c61-465a-9852-593a11d87b87/24247758211.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7c2e3d7-f105-4467-8473-31006ebc1567/noxuvokiretepufuseg.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001286d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1286D 4684 bytes
SHA-256: 4c6295672ec9ec0c5cae16a2d2a22c0ebae44fd8e2e730d4dbf13ebd4ac062f2
font_01_sfnt_off00013884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13884 11488 bytes
SHA-256: 3008765c058cf1ddeaf9f6e2413130ab8e5c1524fb9316d9908054e1fed380ae
font_02_sfnt_off00015ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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