Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fe1742dd8b62c0…

MALICIOUS

PDF

66.0 KB Created: 2021-01-30 16:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d04b821bebe18bba98288cbd3788eb1c SHA-1: 878dbb4e0dcd2ace7dc1ad54aa595e9fdbc61956 SHA-256: 74fe1742dd8b62c0753aa6172c3a3ce6bb18162fd2331ae7490d1de8a460bda4
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/wb?keyword=nsw%20off%20road%20racing%20calendar%202020 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4456376/normal_5ff40995ef15f.pdfIn PDF document text
    • https://cdn.sqhk.co/zokasejiz/Ejeqjgh/pufelojidelakogupomabewe.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/KlnhbAv/brick_out_shoot_the_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/gepaxulunan/M8TgidM/dinosaur_zoom_party.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/vinyl_plank_flooring_installation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/fusovobod.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/jawuxibi.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/bsc_agriculture_hisar_online_form_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/zirconia_crown_preparation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/rabekozoso.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/beamng_drive_car_jump_arena.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/bazaar_movie_2018_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/academic_vocabulary_in_use_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/tunexuwed.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/mukulizezakosejutusexok.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_off0000c45a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC45A 5524 bytes
SHA-256: 53a696e819fba0e7dbe4e510a2d88dc3aec2944e47c2fcbe30710460a6f4581b
font_01_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 10628 bytes
SHA-256: ca2a56fa1e216acc1cf3085f390c6ca6e7d1b79c41143f71903046d8422ee5af