Malicious PDF — malware analysis report

Static analysis result for SHA-256 8feaef74b011e971…

MALICIOUS

PDF

87.8 KB Created: 2021-02-20 19:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 3ca621f2eb14a37e670dff8a1883d157 SHA-1: 6ae192b8e91a37771ef021f184a81dcd5131d5fe SHA-256: 8feaef74b011e97178976920cd8f3f85d2cc960dfc1830fbccaecf66226dd212
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=vampire+mod+minecraft+1.15.2 PDF link annotation
    • http://tokio-2020.fun/2714553743922ltk.pdfIn PDF document text
    • http://wixiziz.iblogger.org/avg_antivirus_._com.pdfIn PDF document text
    • http://erogancolumbia.site/indesign_templates_for_freevdoge.pdfIn PDF document text
    • http://lidlid.xyz/29455499042ikzv1.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/ieZiiAx/90397192772.pdfIn PDF document text
    • http://onlyforyou.space/real_analysis_online_course_stanfordtctvo.pdfIn PDF document text
    • http://vnatural.space/logejalaxax1w7uc.pdfIn PDF document text
    • https://cdn.sqhk.co/saseponirifa/iggg8p9/67432679361.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/WwThebA/racing_car_3d_wallpaper_download.pdfIn PDF document text
    • http://profapp.pro/23806406345dsz4q.pdfIn PDF document text
    • https://cdn.sqhk.co/zotipimesaza/gcggohe/dipifo.pdfIn PDF document text
    • http://filemarker.store/1992918735401daz.pdfIn PDF document text
    • http://shopsmmv.site/16907850679lwllz.pdfIn PDF document text
    • http://prizinsta365.website/smooth_4_app_androidklxf2.pdfIn PDF document text
    • http://zubosoxi.22web.org/vetojiribuli.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/kudowo/jspdf_autotable_set_column_width.pdfIn PDF document text
    • http://dumatefofexulen.epizy.com/kolaxelugaga.pdfIn PDF document text
    • http://dupodege.rf.gd/sigamabu.pdfIn PDF document text
    • http://jepisaf.epizy.com/hallelujah_sheet_music_choir_free.pdfIn PDF document text
    • http://zezunas.epizy.com/mass_percent_composition_worksheet.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_off000100ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EF 5184 bytes
SHA-256: 534697d24c9cbba1d868bac0dde8bfe4d2ab76d276318b2937a8a90f82ef566f
font_01_sfnt_off00011288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 15164 bytes
SHA-256: bf069f1079a4f49c431c962ee75cf7741f3239aae0071978fe57715223d56ef5
font_02_sfnt_off00014222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14222 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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