Malicious PDF — malware analysis report

Static analysis result for SHA-256 509194133f4b925e…

MALICIOUS

PDF

79.2 KB Created: 2021-05-06 02:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4f18b054c82eb538d931142c30947f15 SHA-1: 282d3adf894a5b939162e477a8e379363a302c46 SHA-256: 509194133f4b925ec8f92383b6ec18b463f0c35a376beec88e2d2240384adf54
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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://jacksth.ru/strik?utm_term=peg+perego+john+deere+turf+tractor+parts PDF link annotation
    • http://medicalpracticementor.com/532476578266erx6.pdfIn PDF document text
    • http://4bochki.ru/bild_corona_wunder_bern5stec.pdfIn PDF document text
    • http://worozoxiw.sportsontheweb.net/bhowani_junction.pdfIn PDF document text
    • http://mevakimuvu.mypressonline.com/how_to_make_a_wordpress_website_with_elementor_2020.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/fupir.pdfIn PDF document text
    • http://tiluvopira.medianewsonline.com/13607191134.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/bsc_physics_hons_syllabus.pdfIn PDF document text
    • https://cdn.sqhk.co/bisulalu/QUjbjgq/xeketowatunamusigawaxemak.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvaworizon/jiZhd5c/news_today_nyc_queens.pdfIn PDF document text
    • http://netewe8.xyz/el_nombre_del_viento_libro_completoch6i3.pdfIn PDF document text
    • http://viwafuxofiseko.getenjoyment.net/antrenmanlarla_geometri_2._kitap.pdfIn PDF document text
    • http://fumuroruzej.medianewsonline.com/31800835134.pdfIn PDF document text
    • http://sacredname.ru/4053689244749weq.pdfIn PDF document text
    • http://myluckywin.site/80634735501rs23h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karifopiti.epizy.com/bashment_time_riddim_zip.pdfIn PDF document text
    • https://78905da9-dd21-4190-abaa-c894c042e703.filesusr.com/ugd/851c7c_1f2c3fdf0d2d4da38726a36c00ab781a.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_e303801f199c4227831b4aeb6502b808.pdf?index=trueIn PDF document text
    • http://nesijitazesino.epizy.com/lifanewenodelo.pdfIn PDF document text
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_30cc3f99a1484adfbfbb54d0d14d3ed3.pdf?index=trueIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_cc1dc5168d594997a8bfb455fa55a12c.pdf?index=trueIn PDF document text
    • http://nukuzuxowilaz.epizy.com/fokasuj.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_off0000f6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C2 5464 bytes
SHA-256: 2a600af3a4d1a20adf6ac64dbd3b3852a12d018b6df25eea7d163d453dd70d48
font_01_sfnt_off0001095b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095B 11232 bytes
SHA-256: 68ef62af8a7f0e94e21baccf81accb2fb7abbdf0d8b6a99a838eea92091dd552

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