Malicious PDF — malware analysis report

Static analysis result for SHA-256 1868b730160bf6bf…

MALICIOUS

PDF

70.0 KB Created: 2021-02-06 21:07:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1717886a38aeb6812f910edc4a6749b2 SHA-1: 7e9a0afc3120e253a846ce8e37172498c5cd4ed7 SHA-256: 1868b730160bf6bf58da596edc061a8c63de4874b2f20f0c15f2db979844b744
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector URL, 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 point towards a phishing lure designed to redirect users to malicious infrastructure.

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://yafferge.ru/123?utm_term=north+american+feis+schedule In PDF document text
    • https://cdn.sqhk.co/kusamika/shhmjSB/pixel_s_unknown_battle_ground_mod_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/pUjgeRw/kanukemedalapamemadidagol.pdfIn PDF document text
    • https://cdn.sqhk.co/paxepedamaxa/hcjgidJ/rebuild_edwards_vacuum_pump.pdfIn PDF document text
    • https://cdn.sqhk.co/xijogedobu/ha1hjhi/tolunobutafunirapazeju.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvuvidova/djjVXgj/forest_themed_nursery_wallpaper.pdfIn PDF document text
    • http://terasivox.22web.org/kabbalah_for_beginners.pdfIn PDF document text
    • http://zalofamanaw.22web.org/lefixodebilunogowovuzus.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/JhfEso5/immigration_nation_netflix_documentary.pdfIn PDF document text
    • http://golifidisonopat.iblogger.org/fantasy_football_2019_projections_spreadsheet.pdfIn PDF document text
    • https://cdn.sqhk.co/tubawonidas/jgqghhb/herpes_simplex_1_genital_pregnancy.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/fejififimaketo/hydraulic_bridge_science_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/5277244669.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/beyzbol_formas_satn_al.pdfIn PDF document text
    • http://zaxowudupa.rf.gd/povumipaxena.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/seat_ateca_xcellence_lux_manual.pdfIn PDF document text
    • http://repajazofuwide.epizy.com/23470194228.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_off0000d15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15D 5228 bytes
SHA-256: 57d3e000d6603a005ed0290e298e1b9de0a2b8ab3ebf48a4ddae3967b9485811
font_01_sfnt_off0000e301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE301 11588 bytes
SHA-256: 733b63806e3ffa083ecc1c4d3b5317d3d6b3f4179b97634f53cc27a112963213

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