Malicious PDF — malware analysis report

Static analysis result for SHA-256 b636c1e2871dc0e2…

MALICIOUS

PDF

78.3 KB Created: 2021-02-19 18:24:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d4302cab61c15162735b37511091f377 SHA-1: 094690bc41013f6f6b415fe08f061baabdf3b0e5 SHA-256: b636c1e2871dc0e2bac95c031302c463fcb8d9f68884018751373ba41c3b7097
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://bologen.ru/wb?keyword=what%20size%20speakers%20are%20in%20a%202008%20jeep%20wrangler PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465556/normal_5fcb9caa325fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366008/normal_5ff4a90f74951.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/Aiahh9b/new_air_hockey_tables_for_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fce8a41ba003.pdfIn PDF document text
    • https://cdn.sqhk.co/vebapejun/jDPjcgg/jajavifevawukalasawavupu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_6000680b65eb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5fdb999da279f.pdfIn PDF document text
    • http://daxuzas.22web.org/pijabaluwivunepowijovina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_60132a2b2a578.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485173/normal_5ff713852df55.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/vapite/javascript_alert_html_format.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/nationwide_pet_policy_claim_form.pdfIn PDF document text
    • http://jorowiwiboxizuk.rf.gd/model_boat_building_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/83228116786.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/50031734178.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_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 5844 bytes
SHA-256: e77349281c05834ced44db4332248444f22ea7c86f06f15961d8be7859dc231a
font_01_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 10564 bytes
SHA-256: 804be744790918cc90b745751ec647f7412292b69ab51bd4c83450d83384b17f