Malicious PDF — malware analysis report

Static analysis result for SHA-256 74801ef71d1639d9…

MALICIOUS

PDF

79.1 KB Created: 2021-01-31 22:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6600a88da191a2fabdcb86bbe75d71db SHA-1: 6faa801564c502dacbefd898e79ec43a6d9dcef2 SHA-256: 74801ef71d1639d90e8a0ce25f2290d66b178d8bf0e64a59a6673e3467dea525
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://seumenha.ru/square?utm_term=first+certificate+in+english+4+with+answers PDF link annotation
    • https://cdn.sqhk.co/losokifape/ZUrSxLd/ninja_climbing_claws_wiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458633/normal_6005daaf5b6b3.pdfIn PDF document text
    • http://axacheat4.xyz/muvukijepajio6a9l.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/f48f90673247c96.pdfIn PDF document text
    • http://deutschebank-meine.com/191472739496qpgs.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/dSjjjc6/rogue_hearts_skill_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/giganopof/egfMCig/grail_knight_talents.pdfIn PDF document text
    • https://mudizuponiwox.weebly.com/uploads/1/3/2/7/132740987/76d41592ee4288a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_6015b674b8663.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/0TB5qbf/scorestream_high_school_football.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wifobujaxude.epizy.com/ziluruwobado.pdfIn PDF document text
    • http://zasaraba.epizy.com/modelo_de_agradecimiento_de_tesis.pdfIn PDF document text
    • http://pokitudid.epizy.com/21814586623.pdfIn PDF document text
    • http://xakitidopapav.epizy.com/ruxokadotovuw.pdfIn PDF document text
    • http://xuwanozofugis.epizy.com/luxibubewopufepipizif.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_off0000eca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA7 5280 bytes
SHA-256: 3cef326f879bf35f54446028014fcf368fb9c7c3ba5e4ba27c2e13afc9f4d9e5
font_01_sfnt_off0000feb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 16092 bytes
SHA-256: 4fa7465a7ec3d0dc58cc841029cb4b4ae1c22e6ed43a1c78b4d190cdff26698e