Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b678a20746f84b…

MALICIOUS

PDF

72.0 KB Created: 2021-02-25 23:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4988ab79c8ad7996daf7eb3d642503b4 SHA-1: 8b4397f467a28b7f96cfa46003bff8dda8e541c5 SHA-256: 57b678a20746f84bd5ee9bbaf5e33a0bc70c8a42236f2d444336e55aad5cc9e1
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wb?keyword=how%20to%20install%20car%20seat%20evenflo PDF link annotation
    • https://cdn.sqhk.co/gapekozuwa/ykgeugh/bright_to_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/VrigNYH/nopujipilabolufa.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/653019.pdfIn PDF document text
    • https://kukonite.weebly.com/uploads/1/3/4/6/134611202/monubu_pilipowes_gipavusavilul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5fe1105e00076.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495050/normal_60037ba4ebb4f.pdfIn PDF document text
    • https://xerazagas.weebly.com/uploads/1/3/0/8/130813913/vutetite.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377407/normal_603553ebb1fe8.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/H4UgcxV/rupafuleninobodikosav.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/574122.pdfIn PDF document text
    • https://kurepisafigovu.weebly.com/uploads/1/3/1/3/131398088/fidapekemix_pesuxu_kumujalogime.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/luborinizu/21106381504.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/83245248548.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/hrcp_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/fifozipida.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_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 4988 bytes
SHA-256: 6c49375506b42bc571aec3fddb0ec8c70581f6559c663c950f16fd825b896f0b
font_01_sfnt_off0000f011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF011 10364 bytes
SHA-256: 2cb94418f05e0afe7f4c73a60b0e3d3d81bec8f67d8bb9de65180f6257509172