Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ed03b1e0892745…

MALICIOUS

PDF

71.2 KB Created: 2021-02-25 02:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 58d6677c3e9492474291724f9de5b70d SHA-1: 8a74f8d3237492c4a23c9a51354e217e844f28d7 SHA-256: b4ed03b1e0892745f20d3a86708e2ef69adcfbd4e1527258a98f0861c294cd14
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/wix?keyword=the+maze+game+unblocked+at+school In PDF document text
    • http://golixudib.mypressonline.com/garaj.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/how_to_tell_between_viral_and_bacterial_sinus_infectionwgziw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383922/normal_5ff7c4ac0235e.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/salunumaxemamudasosixedok.pdfIn PDF document text
    • http://mebelintera.ru/lomanco_750_spec_sheetfo688.pdfIn PDF document text
    • http://glawerry.online/27176266422zicpn.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/acido_fosforico_formula_di_struttura.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390663/normal_5ff1da3be6746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471691/normal_6024c70914a01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408462/normal_5fcfac5b5311e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470980/normal_5fcb7b839ad5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_5fdb00e05f026.pdfIn PDF document text
    • http://loxokunetuladi.66ghz.com/bleach_vs_naruto_3._2_ios.pdfIn PDF document text
    • http://zuvilivupeke.iblogger.org/wegapufogoge.pdfIn PDF document text
    • http://ryukzak.digital/who_makes_snapper_pro_zero_turn_mowersj0a2v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412774/normal_5fe7b209279da.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bozexobasunuz.rf.gd/acting_lessons_apk_guide.pdfIn PDF document text
    • http://nudizelaf.rf.gd/72268027810.pdfIn PDF document text
    • http://vobuluga.rf.gd/all_of_statistics_solutions_manual_larry_wasserman.pdfIn PDF document text
    • http://nonosolagosev.epizy.com/chernobyl_hbo_web_series.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_off0000da30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA30 5460 bytes
SHA-256: 60c79e1aa834864e3c8e465d705169660eb846372a6d03c1f93d90eaf728ca41
font_01_sfnt_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 10284 bytes
SHA-256: 1d3bc8956e58e6064dd85cd474f116ed1357523f4c66585affad66bbcb0ae3f1