Malicious PDF — malware analysis report

Static analysis result for SHA-256 820caa2cca4c058f…

MALICIOUS

PDF

72.2 KB Created: 2021-02-12 14:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d93329a3709e407bc07e8955ece97ffa SHA-1: f7f65622d0352ff9ed661b3fd43456079baacf28 SHA-256: 820caa2cca4c058f4314f36772a759a259c9b97f65e40ce2c6be831b6741c1d4
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=earth%2527s+place+in+space+worksheet PDF link annotation
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/zuzaged.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/zeziditof.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/jbkEihI/nokulolumo.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/sawenel-loxuka.pdfIn PDF document text
    • https://cdn.sqhk.co/lamajemomu/NFjdjic/chisel_and_bits_mod_1._14._4.pdfIn PDF document text
    • https://cdn.sqhk.co/xotalawad/33gjO3G/zakurezidarigoxifagi.pdfIn PDF document text
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/dakofele.pdfIn PDF document text
    • https://gajegebukorivip.weebly.com/uploads/1/3/4/4/134487765/juzupigifa-ratox-siluwofoxuzise.pdfIn PDF document text
    • https://cdn.sqhk.co/vomisape/ghjOieb/xaluzinunozemijipavu.pdfIn PDF document text
    • https://garagagu.weebly.com/uploads/1/3/4/3/134364865/torepaj_vusubalodilajen_duziwuwegukusox.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/perurulexi/ajax_post_method_format.pdfIn PDF document text
    • http://fulawumobolofog.epizy.com/dawevalowogapaxewumupope.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/nanugufa.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/nature_and_scope_of_geomorphology_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/lelelisilusodok.pdfIn PDF document text
    • http://wolevovugubim.epizy.com/bed_sheets_melbourne_cheap.pdfIn PDF document text
    • http://wirirarosutuki.epizy.com/alcatel_4019_digital_phone_manual.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_off0000deeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEB 5168 bytes
SHA-256: fe7661022a5c4a115cee600aee1035e05ebbdc6f75aca5e690542cfaa97d2e2c
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 10308 bytes
SHA-256: 4c9536f2ad67bd3f54a4c6192672eb8b6ea03828de8bff99e0b4b07ffb820894