Malicious PDF — malware analysis report

Static analysis result for SHA-256 0303aed8903ca809…

MALICIOUS

PDF

79.5 KB Created: 2021-07-23 03:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3435fdf2a00e0dff962bb7a81500f060 SHA-1: be5e1cf8edd89718491f400aef3c124ce6c60430 SHA-256: 0303aed8903ca809e16c1a4094d292ef5ef1942f1fa5a792b8315590a676b531
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It employs a social engineering lure, instructing the user to install a browser extension or update, a common tactic for credential harvesting or malware delivery. The document also contains numerous links to potentially compromised websites, suggesting it may be part of a larger phishing or malware distribution infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • 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://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/5n3i7u0vi4ideala96r4ueg5a3/benogamudatijadujaziz.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/38479704643.pdfIn PDF document text
    • http://minhanh.com/files/82880054912.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/562673fb665c554283466d75968854bf/fexonusumaxuravi.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0de4a9683---4848151850.pdfIn PDF document text
    • https://aglogistics-bo.net/userfiles/file/39634670178.pdfIn PDF document text
    • https://paperland.bg/uploads/file/wubizimuvegixiluga.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc07d68d09d---82277734716.pdfIn PDF document text
    • https://maxflowfans.com/userfiles/file/30967044325.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a91694ecb9a---17785927638.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/7a129aad218321a688e949e810f415f9/losoderulinaramonedu.pdfIn PDF document text
    • http://briarcliff70.com/clients/874901/File/51338660406.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608246908e9b4---82759642711.pdfIn PDF document text
    • http://gardatrans.com/content/Files/72407577754.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/95200202096.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/83392266225.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ca3c9cd151dd31f769f3ed3488dd607b/14496283887.pdfIn PDF document text
    • http://turinhotelcompany.com/userfiles/files/titosesifanafabuzo.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/58472355101.pdfIn PDF document text
    • https://hartwellcook.com/wp-content/plugins/super-forms/uploads/php/files/d154145d6190363387c6958c44dcdf8b/rotojizaxamowipa.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/rafeza.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/lovigaj.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841a53997bb---76043361667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=pdf+not+showing+in+chromePDF 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_off0000d412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD412 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC24 16784 bytes
SHA-256: 598a415166ee8d874cb9442bd1df555f5fe2299955d396676da920e35677eee9
font_02_sfnt_off0001178d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178D 10800 bytes
SHA-256: 7b964f430f36c8ac6119f8757e4665713a7d9354340256f81f2986d8add1e182

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