Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c46e33388cba026…

MALICIOUS

PDF

73.7 KB Created: 2021-03-19 08:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c488b2ee324b776e2abd5b09902346f SHA-1: 16f4c3e144230c6e6cb25d1c85044f30e6d05ba0 SHA-256: 2c46e33388cba026365a74f2305a7c0f7b33ac6f69334b29d4821418c92e1dcf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=jardine+baby+crib+instructions PDF link annotation
    • http://kusufuxufatup.getenjoyment.net/como_sacar_certificado_de_secundaria.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365646/normal_5ff1b3d870d37.pdfIn PDF document text
    • https://danabemove.weebly.com/uploads/1/3/0/7/130776083/mudidulajif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401973/normal_5fd7fa7383872.pdfIn PDF document text
    • https://girewatadetax.weebly.com/uploads/1/3/2/6/132681062/9398640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483602/normal_601a9be99273b.pdfIn PDF document text
    • https://cdn.sqhk.co/kozutani/pW2iK3K/playstation_emulator_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_601448de83aef.pdfIn PDF document text
    • https://gapuromediwav.weebly.com/uploads/1/3/0/8/130814643/66982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469119/normal_600d32a34d4a6.pdfIn PDF document text
    • https://cdn.sqhk.co/mewivupa/jjfhe0i/ghrce_nagpur_syllabus.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/baxunaf/63998355752.pdfIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_8735ad2031b94884a6172c2cd5a4f29e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/40914781139.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/physiologie_du_tube_digestif.pdfIn PDF document text
    • https://89f68ddc-9f98-4e60-8afa-3e0ca6603e9e.filesusr.com/ugd/4725f1_6d60714c596d4e8e87d0ff4c569e7fd7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/62783686875.pdfIn PDF document text
    • http://wiwosotu.myartsonline.com/cocina_criolla_argentina.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE271 5132 bytes
SHA-256: 6a2d9806faeec35c77c5d0e988387d5c6593d1223a75b3473d92f41df86560d7
font_01_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 11160 bytes
SHA-256: d5216c12ac2e4fc86b21124b6154a6d9ce72a024d0d949095e9e36b376fc99b5

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