Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a83b2bde887ab96…

MALICIOUS

PDF

75.0 KB Created: 2021-02-19 04:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c62ee4838f0817b11b8481566029d604 SHA-1: f0b81d1c27ef3817029cbd3169763366f26377d7 SHA-256: 7a83b2bde887ab961f64694a1a8a5b4033a06bc9806ea157760ce72590034a08
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://crophysi.ru/strik?utm_term=what+does+upward+mean+in+medical+terms In PDF document text
    • http://ek-arenda.ru/emulsion_polymerization_process9dpgc.pdfIn PDF document text
    • http://samozanyat.info/8411276773ku4nd.pdfIn PDF document text
    • http://visiblawty.com/x_men_dark_phoenix_torrent_downloadiib54.pdfIn PDF document text
    • http://datingdate.site/how_to_print_a_fake_car_insurance_cardho8cd.pdfIn PDF document text
    • http://fortuneo.best/que_es_el_acoso_psicologiconozvq.pdfIn PDF document text
    • http://amin-ukraine.net/31105303580ecipl.pdfIn PDF document text
    • http://hargotel.xyz/69656656085ckosi.pdfIn PDF document text
    • http://thesalle.xyz/77587621927sqg37.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukatotapi.epizy.com/esia_screening_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/on_form_submission_jquery.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/4008712219.pdfIn PDF document text
    • http://gidigeja.rf.gd/local_anesthesia_dental_hygiene_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/2912694290.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/computer_labels_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/create_application_load_balancer_aws_terraform.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_off0000e82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82F 5420 bytes
SHA-256: 4818917fe0148e1475a1e7638705bd7d1894fee4a5e62b867f29dbf6472036f9
font_01_sfnt_off0000fa85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA85 10648 bytes
SHA-256: c3a5d79195230ff87c91dc8bb5bcd73967717839be3049e388717534fb1e90df