Malicious PDF — malware analysis report

Static analysis result for SHA-256 1687b77f8809512d…

MALICIOUS

PDF

72.4 KB Created: 2021-02-21 18:23:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cb0bfe09fb1ae0ee1a8a62ac81eedbb9 SHA-1: abdcbb603ca503bd6805e7def046f45dff20f92c SHA-256: 1687b77f8809512d3ee1bf294a0e14859450df39024f751401807686d4a665ff
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://jacksth.ru/wix?keyword=terrarium+tv+apk+download+for+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601726735c9f0.pdfIn PDF document text
    • https://xadinizojagum.weebly.com/uploads/1/3/4/0/134016813/dobukoso-xonamu-binafexogow-maxisikokifu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391636/normal_5fd39a76ac08e.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/reforud.pdfIn PDF document text
    • https://cdn.sqhk.co/gisusisabez/hbklie8/vazepewaguripoxidob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376619/normal_5fecb30e21856.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409107/normal_5fcfa734518c8.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/mubeleruniriwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_60149d2e9845e.pdfIn PDF document text
    • https://kanelepamub.weebly.com/uploads/1/3/4/1/134132184/kiluvok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458849/normal_600257cef4173.pdfIn PDF document text
    • https://zunutupere.weebly.com/uploads/1/3/1/4/131453944/83a974.pdfIn PDF document text
    • https://cdn.sqhk.co/kafexobesa/hjylkeB/72817342714.pdfIn PDF document text
    • https://cdn.sqhk.co/bopesajan/1gjdhjy/summit_trail_climber_at_31_10._50_r15.pdfIn PDF document text
    • https://tefojemitadu.weebly.com/uploads/1/3/1/6/131606809/busitudaxegomito.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474231/normal_5ff530fc8c017.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_off0000e0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CA 5288 bytes
SHA-256: 9e1aae195edfe12231d199fab594245c5e24fb1d3b12b563d684c825b15e2cf3
font_01_sfnt_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 9952 bytes
SHA-256: 7fe976a2ccf279d5f1ca3b62831b792a8fd810c8c49dbfb99312d84efa4e9910