Malicious PDF — malware analysis report

Static analysis result for SHA-256 9664b4bb28687f95…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 08:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1213e3070a11f757bc6001a4ab0dfe6e SHA-1: f53b0e7a1ef27cf7e5b665f2e7025309ddfe71fc SHA-256: 9664b4bb28687f950cb1260df9c026e7f1738861cd39e24d9d728e1a341e87a8
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=que+es+un+procesador+de+texto+ejemplos In PDF document text
    • https://bituxomixa.weebly.com/uploads/1/3/4/1/134131270/5019837.pdfIn PDF document text
    • https://monezoxikaxusoj.weebly.com/uploads/1/3/1/4/131453753/kerijis.pdfIn PDF document text
    • http://ejqy.com/18077724250vypoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff2817e4842f.pdfIn PDF document text
    • http://bilkaita.space/o_manifesto_ambiental_de_noah_stealthlppm.pdfIn PDF document text
    • http://tehnotop.store/crackle_paint_walmartjt1uo.pdfIn PDF document text
    • https://cdn.sqhk.co/zovigobut/hjDChdA/yeezy_supply_350.pdfIn PDF document text
    • https://saxeguwub.weebly.com/uploads/1/3/1/4/131406831/9746163.pdfIn PDF document text
    • https://wobakasufafe.weebly.com/uploads/1/3/2/6/132682589/jepufumavanum-lejov-xemofisaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_601dc86f3f035.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378381/normal_5ff63066776e2.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/pirituxagivukox.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/48ea8.pdfIn PDF document text
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/nezemogovorozawuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lenukedemagi.epizy.com/jabamowuba.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_off0000db7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7B 5424 bytes
SHA-256: f36dec07921a61b5bc0691c7badfd68d6246bf4d628df9ab8032578e66425bf9
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 11432 bytes
SHA-256: 430c4eda8f31fac07bf28a42daf035d0c520e8fc35b7fad358f5fdbf86846c5d

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