Malicious PDF — malware analysis report

Static analysis result for SHA-256 560f282567100cfc…

MALICIOUS

PDF

76.0 KB Created: 2021-06-28 00:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 4199827b12f3e466e657ae7103d2a109 SHA-1: 2595fcccd0914e408faeb30e845c7b190da4a236 SHA-256: 560f282567100cfc2b6bc045339d387dff95f939c533302d0dd63b2a9b7b920c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The presence of JavaScript suggests an attempt to execute malicious code, likely to redirect the user to further malicious content or download additional payloads. The overall structure indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/s3tr60dfg6suhosmgor3neb2ss/53744599771.pdf In PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c9478e9615c---pidadarikubow.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/bvlr5fk9uq9uqb9jbcc8tagm75/55533462006.pdfIn PDF document text
    • https://monuments-msk.ru/wp-content/plugins/super-forms/uploads/php/files/c32c5e4175963861cb17e334356c289c/44843100939.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2bc07f384448fc4d5978ae19ee338a78/41676919190.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/ldvr7pabaec9b477rcsokv1966/medulusewaxowetos.pdfIn PDF document text
    • https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084a70eca733---kekewobu.pdfIn PDF document text
    • http://mamam.by/upload/File/file/39563518490.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/29082217567.pdfIn PDF document text
    • https://samtee.com/admin/images/file/67758972691.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c90e5327f9---divub.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/fcc0295624cd11972732c00b3e5a6800/84395117046.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cnvd1tjb3bhaou70atur0u1tdr/xorotifefudufavij.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e0e0c0a9ca---vezipanubis.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/86561244938.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/fjt89aae2ph1q7d6h2lgrc2l1t/wemibijaluw.pdfIn PDF document text
    • https://cupanghitam.com/contents//files/tamidugefup.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/gasirelosananawefek.pdfIn PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/59571366174.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e9b7a1a89fd4bb834cc8351a336a61d6/26496884459.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a81dd98e213---85387245039.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/26796583401.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/2725993155.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=constant+function+graphPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#Referenced by PDF JavaScript
    • http://purl.org/dc/elements/1.1/Referenced by PDF JavaScript
    • http://ns.adobe.com/pdf/1.3/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/mm/Referenced by PDF JavaScript
    • http://ns.adobe.com/xap/1.0/rights/Referenced by PDF JavaScript
    • 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_off0000c695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC695 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEA7 16808 bytes
SHA-256: ff8eb9ecfb56d780247301acdbb167eee8d743b51f0eb1240928bfa85445f9a3
font_02_sfnt_off00010a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5B 10712 bytes
SHA-256: c8f06eebb7ac6809a29d879e6c240d898b11e8385588ead68f0a3dc0c4dcac2f

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