Malicious PDF — malware analysis report

Static analysis result for SHA-256 4da23a9f043c2806…

MALICIOUS

PDF

65.6 KB Created: 2020-12-18 04:18:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 47ed4ef40c3519b4794178cfcbca4cff SHA-1: afd5fb9d0ddd54888ae6e2fa963c85b527ed5520 SHA-256: 4da23a9f043c28069a747f220d76eaf2a6ca161352bbec90e60563845901c918
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://ggtraff.ru/wb?keyword=brochure%20application%20free In 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/b0846b47-ce6b-4349-9eab-9d60c9d7be00/dryad_house_terraria.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5462fd-74ef-4a88-b48c-65e15d381c29/school_girl_outfit_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fed04e-7ba2-4382-83c4-3ebb25d7f724/fit_girls_guide_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c14d38-71d7-433e-8c52-c7285fa1521a/dovis.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/star_trek_the_next_generation_interactive_technical_manual_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/8187332790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbcfe6f-240d-4dd1-aa78-d83bde3cef95/86730243938.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/go_math_grade_4_answer_key_chapter_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b7f77b-d460-48d3-856f-c5a1bba42e3a/61199665128.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b6c78787e8798971b212/t/5fc3c0b17acac6192a32ff4d/1606664370939/dnd_5e_warlock_prestige_classes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a4c4c46-2cae-4e10-b378-583320721716/what_is_the_purpose_of_a_confirmation_name.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58a1012facd59cecc81e0/t/5fd65134313c42342b8a7f0a/1607881013887/15249322012.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/4574061638.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceae3f98c2cc6d9c17d16a/t/5fd1d96f880fa23343d5d68c/1607588208035/getting_over_it_with_bennett_foddy_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ba46f4-c079-4613-b447-39601dd0fe03/zunop.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_off0000c6d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D5 4972 bytes
SHA-256: 67131135dc885d1738e31bba0b4c7f74d89f3a761bce4f3b9fe68ab8a750e1db
font_01_sfnt_off0000d7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BD 9864 bytes
SHA-256: 3a3affeb62a163ea265f9867a3d77f4e682f2c4f070b9817c8ba8f7e0f71f068

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