Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b4986dab675217…

MALICIOUS

PDF

97.7 KB Created: 2021-06-30 04:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d342549431af60b8e27ae3bb547ad99f SHA-1: 9512e69f482255f1b7ff3785f8c4f676f967f48d SHA-256: e4b4986dab675217005888702736e06cf9b9a8b79733d3b548b0fcf1170724ea
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external links, many pointing to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO-based malware distribution. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/hcj5ogvape91a0k0opf4qj0b05/76221754625.pdf In PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e953d2edd5---34636612638.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a514a1507---jibuzuvewawa.pdfIn PDF document text
    • https://yuss.it/file/2468504027.pdfIn PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/2sb6m4ebe9rgjnhbf558vntuk9/99029097533.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/79532489196.pdfIn PDF document text
    • https://eingangrad.ch/userfiles/files/73318561660.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/gefanagowela.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/30606749536.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/20dd64f57718cebd71bd690853fa7669/56378873839.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/84281975631.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c053548e084d2dbb022d5f0c61f38508/97959892313.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/633f4d396059b391409feff7a5d74089/posaburebimesab.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jujaxasuwopomixogototab.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/34253575614.pdfIn PDF document text
    • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210629024329838991k35jsu.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096f4829e3b9---lisibuzifidezazexotagofuw.pdfIn PDF document text
    • https://micsys.in/userfiles/file/sojakufafesitizakapi.pdfIn PDF document text
    • https://patoman.ro/ckfinder/userfiles/files/pesiganakus.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160948f5730b86---1625441877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=i+want+to+escape+from+this+worldPDF 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_off00011990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11990 10920 bytes
SHA-256: 8fb43eda71e4c78c9b7dd635bce9e1d97544bc3d6fc2ed50dbe9298d5a79d83b
font_01_sfnt_off000132af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AF 18172 bytes
SHA-256: 85b2e5ad4f1d155829c972f30ce965297835d75a8fe9325796a466e6556df456
font_02_sfnt_off000161b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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