Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48a9424005a31dd…

MALICIOUS

PDF

73.8 KB Created: 2021-02-27 15:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eb6538719beeeeb6c986a62bf9df3557 SHA-1: 03a29ac32ec0ab1af7586285e724dd25c486a310 SHA-256: a48a9424005a31dd5ecfb9159c2ca7abd700e06b9914daaeb030a36e4b440266
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=supreme+court+case+study+worksheet+answers In PDF document text
    • http://rukunikuxajosog.22web.org/billionaires_club_video.pdfIn PDF document text
    • https://rebomavarel.weebly.com/uploads/1/3/4/8/134883959/zupafobalel.pdfIn PDF document text
    • https://tiwirekofer.weebly.com/uploads/1/3/5/3/135314588/968492.pdfIn PDF document text
    • https://zatuduxe.weebly.com/uploads/1/3/4/5/134595584/pipadozaduwabo.pdfIn PDF document text
    • https://bitilidejiv.weebly.com/uploads/1/3/4/4/134442737/4143013.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/7id2Qja/neon_runner_malaysia.pdfIn PDF document text
    • https://tigopovon.weebly.com/uploads/1/3/4/2/134235173/konimoxufut.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/vazibupi_fidedafadapun.pdfIn PDF document text
    • https://fubediko.weebly.com/uploads/1/3/1/0/131070718/wugudalasivaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://befadiw.rf.gd/jefaliw.pdfIn PDF document text
    • http://baromar.epizy.com/angielski_czasy_powtrka_do_egzaminu_gimnazjalnego.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/kirchhoff_s_law_worksheet_with_answers.pdfIn PDF document text
    • http://zapudeni.epizy.com/fitivezadesewovukiwugotu.pdfIn PDF document text
    • http://pemukusa.epizy.com/35821171838.pdfIn PDF document text
    • http://dopovis.myartsonline.com/virofuzedewitofugan.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 5640 bytes
SHA-256: d824a46807f8158fc6bc650095b08888634e0acaf8f463c98d83ec44bd906713
font_01_sfnt_off0000f703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF703 10332 bytes
SHA-256: 8447794e6c465a58ce6d6901efe7626c00e50e7d198e478acd6a10b973777738