Malicious PDF — malware analysis report

Static analysis result for SHA-256 b497cd3cb1fdff16…

MALICIOUS

PDF

72.9 KB Created: 2021-03-03 17:04:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 721d8a1ba5fe6c2b6618f5b3692622f9 SHA-1: 9825b40ab0c01046419c444a62c172455611ebd5 SHA-256: b497cd3cb1fdff16a12fa2a63f0682363ee11fb1539c2a57cd987265d97d4e15
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://xezojetit.ru/award?keyword=fodmap+liste+des+aliments+interdits PDF link annotation
    • https://cdn.sqhk.co/tejilunuf/KgfYohb/76031768408.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/9380119.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/hgjapij/leapfrog_3d_learning_system_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5ffc5506ba36c.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/igSnhi3/here_we_go_again_bass_tab_operation_ivy.pdfIn PDF document text
    • http://vuvuga.xyz/sobofafapafelibegaxulodadmw6mz.pdfIn PDF document text
    • http://povar2020.site/what_is_the_summary_of_vampire_diaries1wank.pdfIn PDF document text
    • http://pedosapabosa.iblogger.org/what_is_the_salary_of_hardware_engineer_in_us.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403131/normal_5ff10c9fdecdb.pdfIn PDF document text
    • https://cdn.sqhk.co/tanusulirava/fvuyJn3/flix_movie_theater_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/digubamot/e6JMWge/sigifovolikixowisuzi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455183/normal_5fff14358f1b6.pdfIn PDF document text
    • https://gisogademumes.weebly.com/uploads/1/3/1/3/131379615/sodagema-jofereguxopis-wosobis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD40 5060 bytes
SHA-256: 069bca90e8460cc45b223030350d7b179419049ee422664f722c89bd16118e96
font_01_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 12484 bytes
SHA-256: 663d5b4b198c2c37136b0e4d4c47902f2c688c351ffdd6a0c204644a28f3b11b