Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bf8d26f1532c664…

MALICIOUS

PDF

70.5 KB Created: 2021-02-27 17:49:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 43cd631ad796b0b2d943fe8e02de8593 SHA-1: 08accc0aeb2cd370abe5b1aefa62e06ad2e15e2b SHA-256: 3bf8d26f1532c664d8b031ee67f2ca1be14d9ecd40753ba2267f79fb219962e6
136 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
  • 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://seumenha.ru/wix?keyword=probability+mutually+exclusive+and+independent+events+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494875/normal_5fe030eb1362b.pdfIn PDF document text
    • https://cdn.sqhk.co/kuderoxuz/ajeqGs5/47520710035.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/how_to_replace_battery_in_golf_buddy_vs4.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/cjdhfc5/68242813622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5fea3dc0813f3.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/gigiPgg/wyvern_terraria_steam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403540/normal_60071d85c92a0.pdfIn PDF document text
    • https://cdn.sqhk.co/vumusokutil/bRn2jih/zixumipugevokojosen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462035/normal_5fe78d708fbb9.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/muvojugejoxip/socratic_seminar_sentence_starters_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kujapomib/fafojibodibotovimenizij.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/zimuvimexojalimuru.pdfIn PDF document text
    • http://vunonam.atwebpages.com/61052929276.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/is_there_a_collector_3.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/97037638002.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/64609616624.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/muxesakogufixajipime.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_off0000d395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD395 5840 bytes
SHA-256: a951f802c7cbd09227361bc5ec33f18619268bf167f875fc7cfdaf06a01996df
font_01_sfnt_off0000e769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE769 10824 bytes
SHA-256: a9ecca3a1dcfb5e4fbd9ae121d9b110c6fc6b6d67c2105aad20102263cb80f25