Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a917c6b52c03602…

MALICIOUS

PDF

66.2 KB Created: 2021-02-23 23:15:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 0ef8182f29a040c81837137118d5498f SHA-1: cd24cfa2bc0d1875183a9c4fe0924f9c63178eeb SHA-256: 8a917c6b52c03602f0a16d60b0612357296e2810072c2b9fc9f2d9b6571b501e
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://baarspo.ru/wix?keyword=solidos+de+revolucion+wolfram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408713/normal_5fe9e7ab9c498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381766/normal_601a9f4b29744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366022/normal_5ff25333db210.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417308/normal_5fdbfdab0c08c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5fd0aaf64950a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_600824ef8f889.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466673/normal_601cfb6907503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459470/normal_5fee81337e314.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481411/normal_5fe01cef16db2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378607/normal_60157dc571732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405929/normal_5ffc2e3e2b83f.pdfIn PDF document text
    • https://cdn.sqhk.co/derebeduno/7iaifhg/jetatufufisurebexedamiz.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/giihWih/absorption_spectrum_of_chlorophyll_graph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460968/normal_5fda49f584d89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_60002661e7146.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454967/normal_60261ae98cae2.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/NgjhitX/slicer_machine_hobart.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_off0000bec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC1 5424 bytes
SHA-256: cc3c3f068f8aa7acc7abdf2701347dca0a30dff1608ed5e580507b9870528ac3
font_01_sfnt_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 12792 bytes
SHA-256: 92b32d1f55df1317293302e13789617c0351fab4a705fb3c488f73548f60e0b1