Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3684f18dda6e7b5…

MALICIOUS

PDF

72.7 KB Created: 2021-02-20 10:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a5bce5ed150ede42e14dc72d772a8936 SHA-1: 1a25a0bb336222e12eb4d36b6a066d1c763458be SHA-256: b3684f18dda6e7b56f13d0493ac5ce50575d3f26d917eed3333def110f04c428
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=escuela+clasica+de+la+administracion+resumen PDF link annotation
    • http://fotonagosuslugi-01.space/motemebupuj9p4ai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473035/normal_5ff79713895cf.pdfIn PDF document text
    • https://bijafifevidajun.weebly.com/uploads/1/3/6/0/136051066/6021233.pdfIn PDF document text
    • http://resimpub.com/characteristics_of_fascismca0i5.pdfIn PDF document text
    • http://verification-help.com/chemsheets_calorimetry_3_answersv9vf7.pdfIn PDF document text
    • http://kulupitodawiri.iblogger.org/82244433586.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409606/normal_5ffe2057d1ec2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5fd665047db63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_5ff696ed649d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446489/normal_602d52f45fa04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376601/normal_600526a513573.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/gfhijeF/39057209283.pdfIn PDF document text
    • http://zoompol.xyz/83656570467avbws.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zoletiwosi.rf.gd/best_wireless_backup_camera_for_android.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/enquiry_report_format_in_hospital.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_off0000df1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1A 5040 bytes
SHA-256: 66ea06c679260d92c9d3f528f26fe19e8639f7c67f31793c30d341fc16dc8763
font_01_sfnt_off0000f029.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF029 10960 bytes
SHA-256: a8f9036d22e9eaa0f77403fa46f3810c444cacd06b4ced2e5bcf7e97ff76e9c7