Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bdf91a762559086…

MALICIOUS

PDF

62.9 KB Created: 2020-12-31 09:25:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0d5586c7274d2e80cd9c8b3e6792cba6 SHA-1: d5a65a43b6123fe001c34e79811ff31680b79394 SHA-256: 2bdf91a762559086a69b6d1f8844021d82e6f70498ea4b9536d844e4d32c56eb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, potentially leveraging embedded JavaScript for obfuscation or execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffset.ru/123?utm_term=cell+phone+neck+holder PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4423699/normal_5fca93dfa0676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481156/normal_5faa7313266cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388060/normal_5f98ed30d87f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fdd98e8da2c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417988/normal_5fb4a2b6bedec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383322/normal_5fe7ef135dca6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424364/normal_5fed3b6bbe5b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450048/normal_5fe624cdea732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452154/normal_5fec2361c7ba3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485809/normal_5fcb5ce1a0ba0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/63be7f2b-824a-4cd8-aba5-f9b5149c741f/tajaxisitupaje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70cd6e2b-bb08-478b-b574-8bab1f9b47ec/latukegironesefifetizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7a7aa07-7e6a-48dc-bf68-6da578fd6911/managerial_accounting_study_guides.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f4eee8-b79f-494b-b1d5-e6366b0e4bae/17254035658.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_off0000bc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6A 4744 bytes
SHA-256: fa5a6bf9100cb8824761673cc5adf99729d62f118b898f886e6ce35781d6050c
font_01_sfnt_off0000cc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7E 9928 bytes
SHA-256: 0f7bc206bb775416927b6bff55ecfb8406524d7352b445e75372576a2a153eef

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