Malicious PDF — malware analysis report

Static analysis result for SHA-256 d31a4dd31ba76b5b…

MALICIOUS

PDF

68.1 KB Created: 2021-02-22 08:10:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3162b56ee3d5a33d3f0675248a136f8b SHA-1: ae3cf8bcc2c156df887500077aae52ff0f82f4a4 SHA-256: d31a4dd31ba76b5bf51e3bfe2154c63a7faf069ad378ccd01ef1f925809f83b8
186 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
  • 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.
  • 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=method+and+madness+the+making+of+a+story+pdf PDF link annotation
    • https://zobilajes.weebly.com/uploads/1/3/2/6/132682335/baponades.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/g0hggdl/beyblade_burst_epic_rivals_battle_set_unboxing.pdfIn PDF document text
    • https://fusavufotopos.weebly.com/uploads/1/3/4/6/134634064/wepirevexefo_dexizidozi_labaji_puteranepodij.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzojivemepe/hiifii8/quran_teacher_near_me.pdfIn PDF document text
    • http://jinosewifuwefe.22web.org/titas.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/6379733.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fda20e17dd1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394079/normal_601ff2861f1fc.pdfIn PDF document text
    • https://gukabezifom.weebly.com/uploads/1/3/6/0/136051166/tiviketumu.pdfIn PDF document text
    • https://vugogirofezufus.weebly.com/uploads/1/3/4/3/134355312/nupalu-puzudojipo-ponowusemute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369486/normal_6002acf674e72.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/NIOxhgd/39476644228.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/3946736.pdfIn PDF document text
    • https://romasipunup.weebly.com/uploads/1/3/2/6/132681769/xazorode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://biwipekimati.rf.gd/browallia_new_font_free_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/dinupobodovat.pdfIn PDF document text
    • http://rixatupafavumub.epizy.com/9221838738.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/57789665025.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_off0000cbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE5 5592 bytes
SHA-256: 864b6aabb6d70470539df68decb781350fbb77d11883efabf779bb380e83a98e
font_01_sfnt_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 10492 bytes
SHA-256: 91af13016c61cac45409edf5bd17dc081e84ecea898d0da03fa5470c18c237d5