Malicious PDF — malware analysis report

Static analysis result for SHA-256 423d23521b2bd5c0…

MALICIOUS

PDF

61.5 KB Created: 2021-02-14 19:05:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7c42ece6e8ce32eb13f33dae38545dc4 SHA-1: 34b8e4019f6647619f2b12971a7bdab71d5c0e38 SHA-256: 423d23521b2bd5c0f1dd8f79497dec19fedf372ab754449b59d09b49a5f2e329
136 Risk Score

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
  • 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://druttle.ru/wix?keyword=dr+seuss+characters+pictures PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499021/normal_5fc98b0eb3c4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5ff89e7f306ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459922/normal_5ff016fe5b423.pdfIn PDF document text
    • http://pl50off.info/goldschmidt_2019_abstract_templateuya05.pdfIn PDF document text
    • http://begemot.space/93624602704z8l4x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5fcf5d1f47e8b.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/wedding_crashers_download_480prr5jm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384471/normal_5fc9cb60b9940.pdfIn PDF document text
    • http://service-hire.com/zopedacg2t0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454184/normal_601148f44e215.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/povelenavuviw/forecast_sales_report.pdfIn PDF document text
    • http://sowinoto.epizy.com/20939360839.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/ataraxia_significado.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/10_day_weather_report_boulder_co.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/anglo_concertina_music_sheet.pdfIn PDF document text
    • http://sewoxoxitif.rf.gd/foundation_papers_in_landscape_ecology.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/garnier_serum_sheet_mask_for_dry_skin.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/78027547499.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_off0000b767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB767 4988 bytes
SHA-256: dbc559f914fdb4ad9e00167fea31cd36c6e35efbc41f46934f39271e50022ce0
font_01_sfnt_off0000c860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC860 9568 bytes
SHA-256: a5875c6129ddb884a190dd01875904664e1645bedf35405434099bd9200c6ff7