Malicious PDF — malware analysis report

Static analysis result for SHA-256 4de2326636e063ed…

MALICIOUS

PDF

70.6 KB Created: 2021-01-21 18:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 569f2092a96984ee9a70ea1d9b2a0ce4 SHA-1: 1255d488bfa8336d3a4c97753432cfa50446bcf2 SHA-256: 4de2326636e063ed1403f69a0f85152e99c46431ec32398e2b36c88c9f8f745e
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 an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing or malware delivery attempt, likely initiated via spearphishing.

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
  • 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://gettraff.ru/wb?keyword=lethargy%20symptoms%20in%20toddlers In PDF document text
    • https://site-1168528.mozfiles.com/files/1168528/wakebegek.pdfIn PDF document text
    • https://site-1175722.mozfiles.com/files/1175722/cnc_machine_woodworking_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/SZPoKQx/offline_voice_access_apkpure.pdfIn PDF document text
    • https://site-1248135.mozfiles.com/files/1248135/93724555697.pdfIn PDF document text
    • https://site-1171953.mozfiles.com/files/1171953/multiple_business_accounts_on_instagram_use_music.pdfIn PDF document text
    • https://site-1172679.mozfiles.com/files/1172679/47483876423.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/ayo_and_teo_rolex_1080p_video.pdfIn PDF document text
    • https://site-1176572.mozfiles.com/files/1176572/29190669776.pdfIn PDF document text
    • https://site-1168486.mozfiles.com/files/1168486/solar_system_3d_diagram.pdfIn PDF document text
    • http://xewixejixukumes.22web.org/fortress_react_admin_template_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nenidexixod.epizy.com/sazap.pdfIn PDF document text
    • http://lesizemub.epizy.com/46779931716.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/cardiomiopatia_hipertrfica_felina.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/how_to_teach_report_writing_grade_3.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/46227589661.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/demekawefidesiwuv.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_off0000d6bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BF 5416 bytes
SHA-256: 3dd0e62c158fe2de82f6f5ca79377977f62bf58c2935ae5d35b308e246fbd6ed
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 10388 bytes
SHA-256: 2a56332d8fd09cfa553188a7a811ba7a3121d7456962de7d17d31ad0d1954b7c

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