Malicious PDF — malware analysis report

Static analysis result for SHA-256 5363281fce60d32a…

MALICIOUS

PDF

71.2 KB Created: 2021-01-06 10:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6dbdffc9773491c2e14f03455f19bd3d SHA-1: 0198c4d0dce786e51b6c0decd24d4daf7bd86f21 SHA-256: 5363281fce60d32a362090c3c826ffb915f45ae15b195cba5aedc7dfeb43ae14
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL heuristic point towards a phishing lure designed to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/aws?utm_term=articles+of+organization+florida+template In PDF document text
    • https://cdn.sqhk.co/gesimefav/eShhtWK/alone_lyrics_alan_walker_karaoke.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/s6ghgje/lonemazotilolijuxovas.pdfIn PDF document text
    • https://cdn.sqhk.co/denugesugumu/YKXEDf3/13885392759.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/jbD3gdl/88877790041.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/cjgmXhe/coloring_books_for_sans_2020.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/acf62297-b96d-4c46-9973-522ff3739ccf/nanefejetodamupunam.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/fannie_mae_appraisal_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/android_9_update_issues.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/24430577203.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/gelojikerozunabu.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/sepoxeponetadode.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_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 5512 bytes
SHA-256: ecd8683224a490d3f1255dad7edd8ee83dad4c0492c85a5ccae0fec22dc0a530
font_01_sfnt_off0000edc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC6 9872 bytes
SHA-256: 561cd7de5af316116c43bba541a64c632b095dd5d1bd4e1ffd26fa97a215879d

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