Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdb4e3bb0795d826…

MALICIOUS

PDF

76.1 KB Created: 2021-02-25 13:59:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ee4700c1535b2e05cf2b1a04dea0fb80 SHA-1: d8d3ac815263365fb6b9f4dc20d838a80b3c7dc0 SHA-256: cdb4e3bb0795d826b87ac8f536e98e3b5e26e651ee6f763c46ef62737db106a1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://yafferge.ru/strik?utm_term=f1+error+code+whirlpool+cabrio+dryer In PDF document text
    • https://latopilufazi.weebly.com/uploads/1/3/4/0/134017217/pojivetemifovor-besutanasore.pdfIn PDF document text
    • https://jividakole.weebly.com/uploads/1/3/6/0/136090299/be789.pdfIn PDF document text
    • https://vadizomozizi.weebly.com/uploads/1/3/5/4/135400682/sipugozidemizul-borevexaxiluw-wefasakalafo.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/NiaqPhh/armello_android_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/sewizefaxiki/e1ihfhd/44586671818.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/gokopilefopigij.pdfIn PDF document text
    • https://dakopubelodeb.weebly.com/uploads/1/3/0/7/130775015/vanefofumolokubol.pdfIn PDF document text
    • https://temozune.weebly.com/uploads/1/3/0/7/130738928/9b3423cbe5.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/rjcAL0H/71058836545.pdfIn PDF document text
    • https://buruwezixefekiw.weebly.com/uploads/1/3/0/7/130738548/badugekovedipetiveze.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/99_names_of_allah_flashcards.pdfIn PDF document text
    • https://bomejafir.weebly.com/uploads/1/3/4/7/134725936/4701483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454671/normal_5fccd9a06ad8a.pdfIn PDF document text
    • http://kenugizi.getenjoyment.net/does_cox_cable_offer_newsmax.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/rimejiguvif/padegiwomi.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_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 5324 bytes
SHA-256: d742e14e63014b304a282b27f09585a5ff4fad2e73b5ec04b923b32723d97c33
font_01_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 10712 bytes
SHA-256: 46180ee5d85b2e38233d7ab2cb1297469d581513d50543cca111766424d22043