Malicious PDF — malware analysis report

Static analysis result for SHA-256 252164336ecc8673…

MALICIOUS

PDF

77.2 KB Created: 2021-02-17 07:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 815ec790fa0965ac939e71001806acec SHA-1: 7d05b3092abf0c5ce1e6d714b1c959c61a814fb4 SHA-256: 252164336ecc86735cb9e2f4980602bf4e0dacc593fe5d197962a5b061f3c45c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=how%20to%20calculate%20your%20calorie%20deficit%20to%20lose%20weight PDF link annotation
    • https://kopabiziruzoxol.weebly.com/uploads/1/3/1/4/131406592/75753d66a14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5ff13d3359745.pdfIn PDF document text
    • https://vigobekopu.weebly.com/uploads/1/3/2/3/132302998/8634662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473053/normal_5ffb457aa7c08.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381962/normal_5febe97ec3295.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417535/normal_6011a767291c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376612/normal_600272d55ad1d.pdfIn PDF document text
    • https://lilafigofuku.weebly.com/uploads/1/3/1/3/131398347/9008303.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498978/normal_6003c8082c941.pdfIn PDF document text
    • http://supanigavig.iblogger.org/guia_veganismo.pdfIn PDF document text
    • https://zuxusesomopekem.weebly.com/uploads/1/3/5/3/135305840/mafejifitanivu-ruwesoxe-papozanaj-sasigexunijok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mojofukiw.epizy.com/articulos_cientificos_de_ingenieria_quimica.pdfIn PDF document text
    • http://bosurigazo.epizy.com/orascom_development_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/bazusadaxomomudakizo.pdfIn PDF document text
    • http://zunijakokusageg.epizy.com/4088445805.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_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 5436 bytes
SHA-256: 588bb8d7b7ce6a932fc52ed842bd4777e95b7e53f26bd179aaf08b6745acd3d7
font_01_sfnt_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 10752 bytes
SHA-256: 71005c2c6846dd33bd4226ad451ab7c4fe655a68e33730d2e71262ed6fc0bd2a

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