Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd7425821ba9e27e…

MALICIOUS

PDF

78.0 KB Created: 2021-04-03 08:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec88575ff27964da745b5b873e7c9192 SHA-1: b2e75ce55b1d340c4faac58ba808917ca1ad9ae0 SHA-256: bd7425821ba9e27e5717a1c872140b06d08531ae9b91ac5b420155656013650f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=can+atp+be+stored PDF link annotation
    • https://cdn.sqhk.co/vesagivara/igQJicw/pro_baseball_9_innings_2011.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/annexure_f_for_damaged_passport.pdfIn PDF document text
    • http://zonuvak.medianewsonline.com/34888237294.pdfIn PDF document text
    • http://vekowen.getenjoyment.net/arcgis_10._5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414514/normal_5ffa6bc4bb5ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_603b531f84d29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389354/normal_605674ff12f87.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/laundry_symbols_chart.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/45377682026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_603bea4a03e9b.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/mukep.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/amls_2_edicion_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491164/normal_5fcac9414cd8d.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/TtiiU4R/ind_safety_reporting_regulations.pdfIn PDF document text
    • https://cdn.sqhk.co/zujumatatub/fkHieQQ/zibubave.pdfIn PDF document text
    • https://cdn.sqhk.co/bifoligi/jcjbgcY/561136946.pdfIn PDF document text
    • https://cdn.sqhk.co/musezikuzapi/dScgh7p/download_telegram_x_for_windows_phone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5a98ae10-8c7e-48da-b83f-9bcbc644cfa3.filesusr.com/ugd/9a8764_5e3d14b2da0847bfac50ba95e872d903.pdf?index=trueIn PDF document text
    • http://salajire.onlinewebshop.net/kambikuttan_download.pdfIn PDF document text
    • https://e8c82854-2a0b-4c0f-82de-bac600ce06e6.filesusr.com/ugd/d017d5_a9c4e23e9d884b4ba640b76355b5d26a.pdf?index=trueIn PDF document text
    • http://sinusisokopex.atwebpages.com/solving_equations_variables_on_both_sides.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F3 4824 bytes
SHA-256: 8313ad10afc196b8d44316552d4d47e956fd63994faebb2f68d98a4f49b58466
font_01_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 11336 bytes
SHA-256: cab0113f869187ffa55e1d81bbb4b5fde1f811e4074a62ca7a156ba338bac7a8
font_02_sfnt_off00011cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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