Malicious PDF — malware analysis report

Static analysis result for SHA-256 4299d5a64ea11e0c…

MALICIOUS

PDF

70.2 KB Created: 2021-02-23 08:02:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f0c41b17c0289f63e9528c11d95c8dde SHA-1: abc9db9c9411b873b2da8558749d740345b4ed62 SHA-256: 4299d5a64ea11e0c47d5055842a838b1eaf68a310161edc81734adc324e53565
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wix?keyword=preterito+indefinido+worksheets PDF link annotation
    • https://teseresoj.weebly.com/uploads/1/3/4/6/134644138/8434077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481510/normal_5fdc4ead77349.pdfIn PDF document text
    • http://jitokinut.iblogger.org/admission_war_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487197/normal_5fd8527a67662.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498645/normal_5ffd2c737b073.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383687/normal_5fcf59c19860f.pdfIn PDF document text
    • http://fruit-citrus.space/does_the_general_motors_diet_workabg03.pdfIn PDF document text
    • http://center-about.com/construction_company_financial_statements_2018mgqe7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458618/normal_6004db394d7c8.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/17d5fec74f1b.pdfIn PDF document text
    • http://uspex22.online/29639100851kyh94.pdfIn PDF document text
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/5640772.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vaxesopubowutuf.rf.gd/great_unconformity_grand_canyon.pdfIn PDF document text
    • http://dasilumenuf.rf.gd/zuzet.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_off0000d638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD638 4908 bytes
SHA-256: 013902582f348b2b758c4742a3947d09f6dc0083b6b74dfc5a565879eb11c14c
font_01_sfnt_off0000e6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6FD 10928 bytes
SHA-256: 2842f42720fb2c2db58e5bdfc03bae31d91951f77cc42814d0554255271136cc