Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8c3957b5a3aac78…

MALICIOUS

PDF

64.2 KB Created: 2020-12-03 02:35:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: ef4fa7012fc329536e05954050869832 SHA-1: 4dae81d9a09e305e89afa608c9b748a1325ec48f SHA-256: b8c3957b5a3aac78d1b76514095fc0c1ef907d2688150c36ae97a08fea6ed414
136 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
  • 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://trafficel.ru/square?utm_term=mlb+schedule+playoffs+today PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/ge_15079_timer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/57002790217.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/cash_crusaders_catalogue.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1651bc89e1c4b8fc1e357/t/5fc6daabb2fa4660c8c28086/1606867627568/green_bay_score_last_week.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/ultrasound_guided_embryo_transfer_video.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/effects_of_migration_on_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/kajasasexurojazelivat.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/95381300893.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/acknowledgement_of_a_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/avast_driver_updater_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65c3a24b06a7eb324d99c/t/5fc81ecaee804a17a1c4f916/1606950602091/wonidujazosuvoradoza.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/xotamamupotupisozuku.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/baby_trend_expedition_fx.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/building_drawing_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/94854904070.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_off0000bd79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD79 5396 bytes
SHA-256: 8fd8b973dffca281797460a517f402ea18c971a5d6fde5144da41db4d1a9bc25
font_01_sfnt_off0000cfe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE3 11104 bytes
SHA-256: 09ee80fbc00045454d8824adfbbaa73e39124e492fafc0dfdf52ad54cc962ce7