Malicious PDF — malware analysis report

Static analysis result for SHA-256 3751c79f47043221…

MALICIOUS

PDF

73.0 KB Created: 2021-03-07 19:19:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 508001602132e73fcc86d22b317a8f9a SHA-1: d970d59b2a15d51c98de13f6f1abfd394d5ab6dd SHA-256: 3751c79f4704322190dbb80daafeb8afa5871009ae8fb4f73cd61d87bf61804e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/award?keyword=how+do+i+stop+my+sharp+microwave+from+beeping PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/gedure.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/xadilafa.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/which_double_ovens_are_best.pdfIn PDF document text
    • http://peteferix.mypressonline.com/sizedeguvugaxo.pdfIn PDF document text
    • https://todoxaladavefuk.weebly.com/uploads/1/3/4/5/134529573/3a3be9191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a99e36ed-d2f1-4b88-a75d-e6fd596f28db/audio_technica_lp60x_stylus_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/eigenvalues_and_eigenvectors_problems_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c954130f-6f77-4feb-9ed0-46bcaa08c28d/lanudubuwovewiwesaxunib.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/interview_questions_for_project_managers_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9982bac-3a0f-46ab-90bb-68936d7fb216/what_is_the_main_theme_of_charlie_and_the_chocolate_factory.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/hadouken_sound_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119a2fc1-e1d1-4d37-afc5-f152f8b8a438/24535375430.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/ketoacidosis_management_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/55960828693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f9a57d-3008-4ff9-9097-80ddd7381967/interior_design_schools_in_los_angeles_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/afficheur_7_segments_4_digits_arduino.pdfIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_f1d23c4be6ef4f78adcd6efacf1be1d2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/jixowi.pdfIn PDF document text
    • https://e25b5f36-ee09-4010-8803-019b2853a23b.filesusr.com/ugd/c34eac_b8c225d7fa194a7e98a3dbe194cb44de.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_d55e5c6b79b94967b11e3de6147590a3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/basic_addition_worksheets_with_pictures.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_off0000dede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDE 5892 bytes
SHA-256: 91e0e1ecdcdf4ce42c68ec57b167cfab724dc80408b5a9ef9b33c08fdb458f83
font_01_sfnt_off0000f2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E0 10428 bytes
SHA-256: b0e3cf7b24cbd47a8c4825ab11f6017a9857b02b35b012884715ae8fdf0988cb

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