Malicious PDF — malware analysis report

Static analysis result for SHA-256 0341cc439cf0d547…

MALICIOUS

PDF

122.2 KB Created: 2021-04-13 18:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d5d5e510367c1795c77ac3c4ab31a014 SHA-1: 9f0c4fb422676dffc9eef3023093e35ae791266e SHA-256: 0341cc439cf0d547df09c06fd5f4e9b57725156a2d2b34e1af49b9860697f865
66 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. It contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('jumiwimov.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a malicious intent to obscure the true destination through a network of disposable domains.

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://jumiwimov.ru/strik?utm_term=what+affects+taste+perception PDF link annotation
    • https://cdn.sqhk.co/lizupasepafu/9jfgf0M/love_tester_games2girls.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/7jbkMja/81661070759.pdfIn PDF document text
    • http://sazinoz.mypressonline.com/rimas_y_leyendas_de_becquer_vicens_vives_descargar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383156/normal_5fceb5817a57e.pdfIn PDF document text
    • http://botefin.medianewsonline.com/wololakilijo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491936/normal_60014fdd316fa.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/yiMUgjz/81785293246.pdfIn PDF document text
    • https://cdn.sqhk.co/dulinifijal/mlhjDqy/black_friday_deals_online_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/icJggjj/kipabirulivulewaso.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/62959917798.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/50ba4f3e-2d16-4983-ae67-06fb96bc9cdd/kojibaluzasemiwexekajex.pdfIn PDF document text
    • http://nabafutig.myartsonline.com/tratamiento_biologico_por_lodos_activados.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/59994204581.pdfIn PDF document text
    • http://lapodalojowev.rf.gd/99051015495.pdfIn PDF document text
    • http://vepilezora.epizy.com/16179980487.pdfIn PDF document text
    • http://pupitudaxomibi.epizy.com/descargar_afterlight_2_android.pdfIn PDF document text
    • http://limoxukuk.atwebpages.com/99737398176.pdfIn PDF document text
    • http://nogafojomor.onlinewebshop.net/rarizobuxisujuterara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50164b8-f357-40f6-9962-6f9ba1b894d9/glacier_bay_single_handle_faucet_cartridge_replacement.pdfIn PDF document text
    • http://zukizibukuxupir.epizy.com/62943748742.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AF0 5084 bytes
SHA-256: 8fafa9e72949bc269185f3dea89dd4ca67f3efc95d126738894446ec1fd95c34
font_01_sfnt_off00019c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C49 12108 bytes
SHA-256: 9106005a96df8ad9efb39d9635855ba7514be21cea0de9c1bf89eee8add42ce1
font_02_sfnt_off0001c5a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5A9 16148 bytes
SHA-256: 49436f94d5abf10ca6af8af9848174aab82dfe7bc58a5146411d238fd5c76648

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