Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca91bb2768c418f…

MALICIOUS

PDF

40.3 KB Created: 2020-10-27 14:24:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: f212cefbdf42acf4ee2209406a24574a SHA-1: eb54980db850fb7268bd4d38d49102a75a2b37fa SHA-256: bca91bb2768c418f33c62b404e3ace3a8c56f3f5444838e7f3bf1468651eb686
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.cc/123?keyword=scorpions+rhythm+of+love+album In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/9240989.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/c7b22.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/vunidixeviro_xitosujitupile_kadape.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/nexamif.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/gorixob-wutumikomagi-wadofisid.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/dazemi/annihilation_novel.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/a_programmer_s_introduction_to_mathematics.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/financial_statement_analysis_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/namrata_biochemistry_mcqs.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/voropijujimawabofirewe.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/kenuxewusu.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/genedopop.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/78812881056.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18861ef9-6e0b-455c-83fd-9e6787897926/xemutasaxukarexima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc64b0b4-8f4f-45f7-8fba-0977e23efd5f/dufitowidetuxewinidesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e93b87-6cc2-48a3-8cdc-d2879f2f2d84/fumurob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba785b19-fec1-4182-86e6-550bc3785481/jikadovesalinori.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/bsc_1st_year_maths_book_download_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/47887335054.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/12767793762.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_off000059f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59F8 5660 bytes
SHA-256: d7e520e47323c4b19f8acdb887a82c8f03ed786b108e1f914284710b17561e0c
font_01_sfnt_off00006d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0D 12044 bytes
SHA-256: 763198bccf7976c64604f65b2ed0a353b955bdcd0828baa39d0a8a0da782aeab