Malicious PDF — malware analysis report

Static analysis result for SHA-256 924e4317ef6bbe37…

MALICIOUS

PDF

67.9 KB Created: 2021-03-02 22:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e7b2ad9393db93d0af0104430f5a3f2e SHA-1: fd6041bb98f08a7ca888e1cdf7cd7ec8d83b9758 SHA-256: 924e4317ef6bbe378705057cbf057f47883326b215d9cf7ce6d56e2859f37a31
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=how+to+take+apart+a+paperpro+stapler PDF link annotation
    • https://cdn.sqhk.co/gunuzuli/HOhcrhh/78832133499.pdfIn PDF document text
    • https://cdn.sqhk.co/wusoxopejezo/ghUeumL/healthy_delicious_recipes_for_lunch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5fee6b0351b2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382186/normal_5fc861075cfd8.pdfIn PDF document text
    • https://cdn.sqhk.co/tepikipo/hjj9qhj/78580675801.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_60261d9ea8c35.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/UIOhfwn/classcraft_student_intro_video.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/jaBNgeL/space_runaway_ideon_be_invoked.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/jajauO2/17832902209.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/2ichj9W/emergency_dentist_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/ifigg7M/99092522200.pdfIn PDF document text
    • https://tuzidatawuno.weebly.com/uploads/1/3/4/9/134902979/8736442.pdfIn PDF document text
    • http://verifiedbadges-form.com/tecnicas_de_aprendizaje_colaborativo_elizabeth_f._barkleys6jqp.pdfIn PDF document text
    • http://auth02mobility.com/15730405142h1qgn.pdfIn PDF document text
    • https://cdn.sqhk.co/nesorosuxim/gjgha6L/how_to_make_origami_animals_with_printer_paper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_603603259beaf.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_off0000cd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD4A 4928 bytes
SHA-256: 18d80b26c2d9b55b0525382f0534ebfa1d16e4463fec08f923049fede97f02cd
font_01_sfnt_off0000de2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2A 10820 bytes
SHA-256: 3a5c766a9819082b9ac9c64fa8fc1e86b76e5652cf1eb056c84ddf7c16abc1c0

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