Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df43b76842fa578…

MALICIOUS

PDF

65.4 KB Created: 2021-02-23 14:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f6755077bdabe8355b7efb77f55bdee8 SHA-1: 51fc3e5881c9aecb6a0a20f7d331c3933d65949f SHA-256: 0df43b76842fa57890f63583aa920545615abc73975b4b9934c3717dd194e52c
194 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
  • 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/wix?keyword=canvas+granite+falls+high+school In PDF document text
    • https://cdn.sqhk.co/disemelukap/YrhdYA7/62564902768.pdfIn PDF document text
    • https://cdn.sqhk.co/nawiwola/nighggi/70667569789.pdfIn PDF document text
    • https://cdn.sqhk.co/butemobe/f4ichev/w_radio_bogota_colombia.pdfIn PDF document text
    • https://cdn.sqhk.co/xudevekelefe/jehifil/mudugemozibojajogalegelus.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465537/normal_5fc7389d49319.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubokave/hgfkGja/cedh_tournament_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/dediwifime/jcsjcjf/warrior_of_fate_2_rom.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/ghbdxVp/54646624844.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384036/normal_5fdf7296500ca.pdfIn PDF document text
    • https://cdn.sqhk.co/dofubetu/hggi0gf/ordinal_scale_example.pdfIn PDF document text
    • https://cdn.sqhk.co/jadosoxiko/eahcVhb/68516435502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_600ca28d26370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_6028e7e37107e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461766/normal_5ff457c8de325.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/fadadedezeker/pigumudatezosami.pdfIn PDF document text
    • https://graniteschools.instructure.com/In 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_off0000c440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC440 5108 bytes
SHA-256: 56a8fb4c0dff11bd46b8a636ee83b4c4706b67118eaf4f6e2cdbbe87626c0980
font_01_sfnt_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 10332 bytes
SHA-256: 79d3bca21ecf5031c66aee4ffa4c99705af004b7219691cfd5b5cbe978a06869