Malicious PDF — malware analysis report

Static analysis result for SHA-256 5461c6cba60eea2f…

MALICIOUS

PDF

157.1 KB Created: 2021-01-01 23:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9dfbd4843f3a5c1767367bdc6cc20fce SHA-1: e8ba5e867bcec40f516be9ed26ac358edd496cc7 SHA-256: 5461c6cba60eea2fb6258fe1810d46395550d2676fcca58cda88bbd7f4c4c3bb
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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://ggtraff.ru/123?utm_term=the+cove+video+worksheet+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4423452/normal_5fb5591f40180.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463006/normal_5fdb7be824cb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_5fbe9da2c1891.pdfIn PDF document text
    • https://jilarikogezinuv.weebly.com/uploads/1/3/0/9/130969280/nuvubifixete.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/5963702.pdfIn PDF document text
    • https://wijizavop.weebly.com/uploads/1/3/4/3/134309393/82aa30.pdfIn PDF document text
    • https://bumenabizobopum.weebly.com/uploads/1/3/4/4/134462968/630597.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/8082911.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://s3.amazonaws.com/wixamupelinere/fonivumawebegekojabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430c9790-e3c4-4f19-aaa7-caee3dffd7d2/binekana.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/13105691913.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/63398117756.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/rorozuwejasozasajunaboga.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/jixusenupo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22207 4948 bytes
SHA-256: 9f6ad0bf965791c8d187686c59de1cfa6cc03ffd8e172f6305ad9bc3f5cf4142
font_01_sfnt_off000232dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x232DD 11536 bytes
SHA-256: f9954913d056f2409375750cdbcbbf82386029aade781377079d2526af62b9ae
font_02_sfnt_off00025900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25900 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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