Malicious PDF — malware analysis report

Static analysis result for SHA-256 d210c74f86c2c59f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-14 11:06:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f47969955a9babf5324f7958115d7b70 SHA-1: 525a382c1127608d611f7d75367ddf75c94e43b7 SHA-256: d210c74f86c2c59f1a119b06d0ed8ee8092520171f303e1dd690ce35639b0dae
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://leonvi.ru/123?utm_term=asus+laptop+webcam+driver+free PDF link annotation
    • http://resimpub.com/bill_of_exchange_format_in_exceljcgeu.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/acquisitions_incorporated_online_free.pdfIn PDF document text
    • http://usesalle.xyz/dante_divina_commedia_inferno_canto_5t8xru.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/how_to_reply_professionally_to_a_thank_you_email.pdfIn PDF document text
    • http://lnstagramverifiedbadge-form.com/52497703885aymot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_696f06f43ea744d7ae87f64130859b07.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/ny_dmv_test_practice.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/how_to_put_a_stoeger_m3500_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d4e250d-6903-43d7-9d5b-e319cc6c3569/behind_closed_doors_short_film_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/vopuraxojebazoxolazag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fcc221-92f3-4403-8511-ca0cc38583af/sepevoguve.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/7375511046.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/55114712008.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/dell_latitude_e6410_laptop_wont_start_up.pdfIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/android_app_development_course_fees.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_88d1accec12d4e6fb059fdb7062beeb3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/memexelu/alphabetical_order_worksheets_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3db3897-6bc5-4015-adcc-ad8c99196070/repizudoguresewukeb.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/solving_linear_equations_word_problems_worksheet.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_069f96937408459f8b9bb3e36e84bc5f.pdf?index=trueIn PDF document text
    • http://bifiwapaz.onlinewebshop.net/how_do_you_change_an_equation_from_point-slope_form_to_slope-intercept_form.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_off000115ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EF 5584 bytes
SHA-256: 91aee7b4c236ccdcdd42d2363b84d3d863d2a9ac95821cb47fff78fd0b6706bd
font_01_sfnt_off000128e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E6 11276 bytes
SHA-256: f2cafea9df568b95f4b15eb022b90dc38e2682d3e0c5ee407c8551e9a4b2f03e

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