Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a3c81e55b24b13…

MALICIOUS

PDF

72.1 KB Created: 2021-02-22 01:21:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5b723b12f0659f49af11c982f39e3d6c SHA-1: 6df1f654ba61b0c4254f961a2b2a22b2fb92e72d SHA-256: a6a3c81e55b24b13505874e5270b8efa9cee3aee6845109db04f2fec2b5020fa
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=venn+diagram+love+friendship PDF link annotation
    • https://cdn.sqhk.co/kulobuwaxegu/apyjWP4/zukuputasonesiduga.pdfIn PDF document text
    • http://chelobaka.space/shark_navigator_dlx_vacuum_ratingscaiqi.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/bihWIid/disassembly_3d_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481157/normal_601db5311b98a.pdfIn PDF document text
    • https://cdn.sqhk.co/suxevevagova/AjJnict/81933189243.pdfIn PDF document text
    • https://cdn.sqhk.co/sevilebup/gcifghM/pocket_tanks_deluxe_free_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/jFDzRrP/picsart_photo_studio_download_for_windows_8._1.pdfIn PDF document text
    • https://cdn.sqhk.co/mamozinuba/phiajaP/2334473874.pdfIn PDF document text
    • https://cdn.sqhk.co/mareduviger/QThhidW/christmas_movie_trivia_questions_and_answers_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/Pgg4lha/human_fall_flat_xbox_360_rgh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bamoxopigodarok.epizy.com/duboziguwol.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/taco_bell_crunchy_taco_carbohydrates.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_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 5480 bytes
SHA-256: 8491720cf6f2283c0bbfbaf15428683f8600092dd6fd6573464ba70c289b68b5
font_01_sfnt_off0000effc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFC 10504 bytes
SHA-256: 284578fdf76eef32c019b9decc59327a5f26625846209b11733355cc500b9d15