Malicious PDF — malware analysis report

Static analysis result for SHA-256 06823c29a6955b92…

MALICIOUS

PDF

96.2 KB Created: 2021-03-30 05:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 702794294fc2c1c3d4b09f7dde6bb4f5 SHA-1: 46191a6f9eb1b682750fbccf384c501dd3ab2427 SHA-256: 06823c29a6955b92e773f5b16cedee9d0d125e919c52ac60e2798c3fca418e09
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://resalured.ru/award?keyword=abdul+karim+soroush+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fd941442fec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409607/normal_5ff0dfe02e61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_605ff2dd4527c.pdfIn PDF document text
    • http://woronari.getenjoyment.net/67395531716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378164/normal_6012bd6c6c2db.pdfIn PDF document text
    • http://rumepado.mypressonline.com/62155989532.pdfIn PDF document text
    • http://rolivazugatar.scienceontheweb.net/do_you_capitalize_than_in_a_title.pdfIn PDF document text
    • http://dularifok.22web.org/history_of_kashmir_in_urdu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1611654-e4a5-4992-8685-e310130eb861/the_rebel_camus_analysis.pdfIn PDF document text
    • http://sisufovofow.atwebpages.com/35279622251.pdfIn PDF document text
    • https://5d55c623-01b0-417f-8131-8dfd0334080c.filesusr.com/ugd/9ef046_65a552d7b19f413b97299ed25368bece.pdf?index=trueIn PDF document text
    • http://foniwedexe.epizy.com/gas_club_car_golf_carts_for_sale.pdfIn PDF document text
    • http://kuwulanunemitiv.epizy.com/certificate_of_origin_form_a.pdfIn PDF document text
    • http://vexabimumemig.atwebpages.com/32865675837.pdfIn PDF document text
    • http://pesipobigon.rf.gd/circulatory_system_ncert.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cd4fab9-d6a2-4d2d-bee3-988ec821f512/what_factors_affect_the_heart_rate_of_daphnia.pdfIn PDF document text
    • http://gojudupawoziwex.epizy.com/8658005442.pdfIn PDF document text
    • https://0ef2f354-78a3-4528-990c-72f69c86fc6a.filesusr.com/ugd/6a0da6_07563986b5534dddbe79277730d8f778.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001545c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1545C 18748 bytes
SHA-256: d1cbbf5ab37e9a931a7ccb4eaabfd504de88fb706dc618a1fd773f836c40e170
font_00_sfnt_off000118da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DA 5472 bytes
SHA-256: 007fec35bb0f9298a86aa9214d549926c693285de8b7e4ca76ff119f93303f65
font_01_sfnt_off00012b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B42 12196 bytes
SHA-256: b92aaf00b858a3feb32f13e27f3f51b9b8e335deab083453eb5f8176474f4ab0

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