Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b48e9c2362a5b43…

MALICIOUS

PDF

75.5 KB Created: 2021-02-01 00:07:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5d5428aeb1d89f283ef61dbd8ec02081 SHA-1: f7e490b7014d40b3e4d690e3de8b85cf23c548f9 SHA-256: 6b48e9c2362a5b437408a964f585e32e2621d8c6213209594397ad02c254c7b1
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://crophysi.ru/123?utm_term=rexxar+5+mask+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489969/normal_601729a88471c.pdfIn PDF document text
    • https://cdn.sqhk.co/bazexolareja/2Gyidif/mastercraft_x23_wakesurf_settings.pdfIn PDF document text
    • https://giravegide.weebly.com/uploads/1/3/2/6/132681237/fafidezodim.pdfIn PDF document text
    • http://bt-management.website/como_consultar_o_saldo_do_cartao_rapido_luxofrbzu.pdfIn PDF document text
    • http://ventager.online/symbole_schema_electrique_maison_belgiqueo16vm.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/fb7ec.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/xafele_lulidedo_zipededogogudin_mawesi.pdfIn PDF document text
    • https://fevepoxopimumu.weebly.com/uploads/1/3/2/3/132302951/rezogiw_tisuno.pdfIn PDF document text
    • https://lafajadisevo.weebly.com/uploads/1/3/1/4/131454770/e2b0e6f993.pdfIn PDF document text
    • http://regsen.website/64903228831le2xk.pdfIn PDF document text
    • http://hugertely.xyz/swtor_legacy_guidek3d14.pdfIn PDF document text
    • https://zeteleginogegop.weebly.com/uploads/1/3/4/5/134526156/jijagamojav_pimelafon.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/seKPhd8/felopukifafoxa.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/iziasif/wafoxiza.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/fejatepudopito/25607134795.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_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 5376 bytes
SHA-256: d08c7f0161dfc2401b3df7a1f6ffcac50b44d1d7e82badd7eee5fa17ca42b123
font_01_sfnt_off0000fd36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD36 10644 bytes
SHA-256: 18725382916c7ccb668d531efba29e07eca099b1cf771cfda12cdbefa65170f9