Malicious PDF — malware analysis report

Static analysis result for SHA-256 5545142021bd8a53…

MALICIOUS

PDF

71.8 KB Created: 2021-02-27 11:33:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8568a0c31d1c54307a5370bef4f79ba9 SHA-1: d74515090ef93206f1230de91dd648a272bee130 SHA-256: 5545142021bd8a537550abd1e40c06248e1e882b1e4f1fa1bac7bed3511a595c
134 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/award?keyword=diccionario+b%25C3%25ADblico+reina+valera+1960+gratis+para+pc PDF link annotation
    • http://blancer.xyz/38699818168bqfcx.pdfIn PDF document text
    • https://sovipepunufo.weebly.com/uploads/1/3/5/4/135400675/gadasivatorusutawej.pdfIn PDF document text
    • http://xozonline.ru/una_furtiva_lagrima_donizettijx8ny.pdfIn PDF document text
    • http://getcreditcheck.info/fexixazorofonimifovusiakdtn.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/rewabovud.pdfIn PDF document text
    • http://stepka2016.xyz/full_size_platform_bed_with_tufted_headboard7hoot.pdfIn PDF document text
    • http://miiliioner.xyz/45794827808k3unm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404725/normal_6027f157cfa37.pdfIn PDF document text
    • https://nafogoke.weebly.com/uploads/1/3/4/7/134776139/9979532.pdfIn PDF document text
    • http://verification-help.com/pifitidagg27ew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://varoniwarovez.rf.gd/gusapukorajetaru.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_off0000d750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD750 5860 bytes
SHA-256: 975a5b0696874a13b8d954c08988cddd073b414f0393ad08eb8b7bac3eaafcfc
font_01_sfnt_off0000eb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB5D 11284 bytes
SHA-256: 8c784d9e578287ea11a0e2f5ae67fd148acf36e4959d457cba2bf020c1f9b7be