Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26403e9c1aa0dfd…

MALICIOUS

PDF

206.4 KB Created: 2021-03-18 10:58:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3924c5e7bff103211ddcb7e4df2ecf55 SHA-1: ceebab7b3b000bd70782d624b1e3f8dc98642c0e SHA-256: a26403e9c1aa0dfd078f6901e88925ad9cc7fa00b1e94840e6c4bf85334b5e48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and appears to be malformed, suggesting it is not intended for human readability but rather to host malicious content or redirect the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/award?keyword=frecuencia+respiratoria+concepto+pdf
    • https://puwedogomep.weebly.com/uploads/1/3/1/3/131382223/woxixi.pdf
    • https://sisezapude.weebly.com/uploads/1/3/1/3/131398367/fba165ff0f6d.pdf
    • http://sluzhba1.net/67516409363kvs8d.pdf
    • http://korsabarca.com/subaru_pressure_washer_troubleshootingshq9p.pdf
    • https://bavamelamasol.weebly.com/uploads/1/3/4/7/134714994/2017647.pdf
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/xizopipakaxu_pajeserofarusu.pdf
    • http://creamwalls.online/221117699786q02a.pdf
    • http://nopezimugabotik.mygamesonline.org/the_night_frederic_malle_sample.pdf
    • http://redofokotab.sportsontheweb.net/xakeros.pdf
    • https://lovarewido.weebly.com/uploads/1/3/4/3/134322716/72e53cd65e67.pdf
    • https://pupokidam.weebly.com/uploads/1/3/1/3/131381904/288233.pdf
    • http://bajifepeselok.sportsontheweb.net/tadisobepoluwa.pdf
    • https://fegedagupadid.weebly.com/uploads/1/3/1/8/131856554/7b68b8.pdf
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/kagewizu_zerivomeboxeke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dejibokakar.onlinewebshop.net/suxijezadojatejib.pdf
    • https://5c71d6b4-13b5-43a2-97a4-9a0eba4d0f4d.filesusr.com/ugd/0f1814_80014d832ca14d12b403fd30fa83b832.pdf?index=true
    • http://peledopa.myartsonline.com/debusupajevep.pdf
    • http://vamavaremimot.atwebpages.com/biomass_briquetting_technology_and_practices.pdf
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_18629315c04d4dd8ad066ce8812443bf.pdf?index=true
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_5df1b97d4f2643c1aee4fac44581391b.pdf?index=true
    • http://sewujajapivix.onlinewebshop.net/71092362028.pdf
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_5914d9a3913d4d4ba031b4586272c889.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002ecbf.bin
91cb94226e3bbc6b44eee6730c81c610d3215053ec9befcb45746f8a3e24b630		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECBF 5072 bytes
font_01_sfnt_off0002fe12.bin
6dd0ca88bba1e24f0ebe65b2353f492327c7d3a5c96f663277841b6452a41116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE12 13564 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.