Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f498e485c15aef…

MALICIOUS

PDF

67.7 KB Created: 2021-02-20 00:37:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b947fd4ab1a66922e12a92a05b262ca3 SHA-1: f38da80133b7e612af8219c026e67c88951998b2 SHA-256: 77f498e485c15aefadd2178caf4a61b44b997640bee380fc04f6efe60c7d7077
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://druttle.ru/wix?keyword=abriendo+paso+gramatica+answers PDF link annotation
    • https://mujesazuf.weebly.com/uploads/1/3/2/3/132302915/63813a172.pdfIn PDF document text
    • https://bivesazi.weebly.com/uploads/1/3/4/6/134652180/c64624.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/fKheUhg/zefukalawi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450883/normal_5ff9cf350e4b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446166/normal_5ffb7f7b87995.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491936/normal_60014f9d36d83.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/jpyQmid/vukezimonidig.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383800/normal_5fc6803861631.pdfIn PDF document text
    • https://cdn.sqhk.co/razilipot/jbcJRH7/roberts_construction_company_dumfries_va.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/fagesokogimo-sebepebub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480142/normal_600cec413d036.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498992/normal_601b1a5d82642.pdfIn PDF document text
    • https://kuwobudub.weebly.com/uploads/1/3/4/5/134587752/wujakevatoruzisox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379363/normal_5ff5ebbd05a3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407562/normal_6021cf8954294.pdfIn PDF document text
    • https://vufuredupe.weebly.com/uploads/1/3/0/7/130776381/552149.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/vabedafozo/phylum_protozoa_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/29408550878.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/english_level_test_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/noxxa_breadmaker_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/gimujopufosakokupupa.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_off0000cd87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD87 5584 bytes
SHA-256: a29a2b7f7271f79bbb1a7fbd725774abc1787cac26e660277e8f1cd08c472bc1
font_01_sfnt_off0000e076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE076 9596 bytes
SHA-256: 8f89494c6ecadb757fec8512a98d5cee5f84b1faf79c3f71d63e630560270819

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