Malicious PDF — malware analysis report

Static analysis result for SHA-256 b225d53432e3a2f3…

MALICIOUS

PDF

87.1 KB Created: 2021-09-18 08:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6fe960a8adc25a4f198bcf3746e17143 SHA-1: 46914515259e53c61bcbbabcdb7315ec50648a06 SHA-256: b225d53432e3a2f3a94ad70e2a66acd1cc4d568b54ee535844f28bd48aaeb8b8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is a link farm hosted on disposable domains, designed to redirect users to multiple external sites. While no scripts were explicitly extracted, the nature of link farms and the ML detection suggest an intent to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infosantiere.ro/userfiles/file/suwinolomurojefagolepo.pdf In PDF document text
    • http://phongkhamthienhoa.vn/images/files/vijulerezomoneledazeputa.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/79417966051.pdfIn PDF document text
    • http://mateuszkucharski.pl/admin/file/xejapuk.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/batazagenifugebumakuno.pdfIn PDF document text
    • https://ksboutlet.com/file/files/sakegefazugojoxa.pdfIn PDF document text
    • http://hoachattn.com/image/files/40368329142.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/xotixekalusewarimez.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/fafalerujevekikep.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/purepev.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/nixugakaxirudiguse.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/30819849948.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///14625085701.pdfIn PDF document text
    • http://theclelandgroup.com/img/upload/file/jadomoluken.pdfIn PDF document text
    • http://thamcohoaian.com/webroot/img/files/juwaxitafosu.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/sowuwimitupag.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/ziven.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/rufebuz.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/96487672867.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/tudazubufidolepozexojusi.pdfIn PDF document text
    • https://ngoctraithaibinhduong.com/uploads/news_file/terovurewaradobukoto.pdfIn PDF document text
    • https://megatekspb.ru/sites/default/files/uploads/78538737285.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/d22ddfe510f7d3722271f2799c5e2435/5422202698.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sons+of+anarchy+game+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 10968 bytes
SHA-256: 45af4136515d691037d5306d215e659d5eece3cd01d1f840d282f8a678b0bac8
font_01_sfnt_off000109fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109FD 17172 bytes
SHA-256: 2f3a2b567a2a3ed831864ea0a504c636cbdab4e2457a91f2d9deb3e6459ebb05
font_02_sfnt_off0001364c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1364C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1