Malicious PDF — malware analysis report

Static analysis result for SHA-256 be250bff4fb4b5d3…

MALICIOUS

PDF

74.5 KB Created: 2021-02-28 05:14:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ca1698c60a0822cba020ce11df9e8914 SHA-1: c2f1133cfa844e50ee30769c1d1f133ebd951666 SHA-256: be250bff4fb4b5d3d1f9490029eec86f178bcf97b40754bc9ea4681978efa3ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://vilenefex.ru/wb?keyword=how%20to%20solve%20a%203x3%20rubik PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477649/normal_6031d846f1305.pdfIn PDF document text
    • http://boxidodo.22web.org/maven_surefire_plugin_html_report.pdfIn PDF document text
    • http://mefomizus.22web.org/poulan_chainsaw_p3416_price.pdfIn PDF document text
    • http://zifasito.22web.org/aula_informatica_uib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5ff19317a24bd.pdfIn PDF document text
    • http://zenizumalem.22web.org/call_center_customer_service_representative_resume_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404741/normal_6022d11bf2705.pdfIn PDF document text
    • https://wozaxopuvomu.weebly.com/uploads/1/3/0/7/130740129/texixuvegesijesalima.pdfIn PDF document text
    • https://jexepasevotapak.weebly.com/uploads/1/3/1/6/131606223/9480767.pdfIn PDF document text
    • http://nevogixire.22web.org/coordinate_geometry_aptitude_questions_with_answers.pdfIn PDF document text
    • http://kolejuf.iblogger.org/strengthening_exercises_for_shoulder.pdfIn PDF document text
    • https://vilenefex.ru/wb?keyword=how%20to%20solve%20a%203x3%20rubik's%20cube%20easy%20tutorialPDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/roku_2_xd_power_supply_specs.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/39445947562.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/hp_photosmart_5520_printhead_damaged.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/atoms_isotopes_and_ions_worksheet_answers.pdfIn PDF document text
    • http://piwunutid.epizy.com/ecg_report_qrs.pdfIn PDF document text
    • http://fokunibilolegek.rf.gd/73049797485.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/bape_wallpaper_hd.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_off0000e66e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66E 5476 bytes
SHA-256: 4f8124c38bb5a1ec76c3f4cb5efa5db6d762279f368f8152c439f8997503a203
font_01_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 10368 bytes
SHA-256: ffd26d7c919a94679a94520cfdc844c221040b69171de4135870ca46ed2e0f74

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