Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c2b399d9aff915…

MALICIOUS

PDF

80.0 KB Created: 2021-04-23 22:46:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2161c2903ff1cd8e9d1fe46d63629386 SHA-1: 4535f9df9c0f155375a17b318d186ccc8f10274f SHA-256: 97c2b399d9aff9153fdc03101188fa1cf07620856c2a3bf557b4cfb6751d8cff
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain that appears to be part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=my+roku+remote+is+not+working+even+with+new+batteries PDF link annotation
    • http://buwubaled.mywebcommunity.org/aliments_riches_en_protines_musculation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fd9bc6ac7432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_5fe5d43c035c3.pdfIn PDF document text
    • http://vatamuvemazaril.sportsontheweb.net/79463864789.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/30366884581.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/89740008371.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/reasoning_aptitude_questions_and_answers_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6043e9d0281e6.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/fopalew/ozark_trail_led_rechargeable_lantern_replacement_battery.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_6b19741ae9ad40c885f0b508b834779e.pdf?index=trueIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_26c0f00e1fa64795a3533fa3d46517e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/los_rios_de_color_purpura_pelicula_completa_en_espaol_latino_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/dutetijipas.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/aditivos_para_concreto_sika.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_71699d691665468f830fbaab24ccdabb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/little_blackfoot_river_montana_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/frigidaire_gallery_electric_range_parts_list.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_bfab6fa63fa44c91b34474b3b7f2d64e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/bmw_x2_manual.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_af019250cc4c48fb92f6ac92eadb2aaa.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF818 5528 bytes
SHA-256: aa0889ccb63044949564aea35e45288278ebfee6bbfe3618f383d3512b2973eb
font_01_sfnt_off00010ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 11592 bytes
SHA-256: 397b8e7ea844913c9563db88b6a167efcbf1a956a221ee38f6946370779ff9a4

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