Malicious PDF — malware analysis report

Static analysis result for SHA-256 59dd57f9b820cf75…

MALICIOUS

PDF

76.5 KB Created: 2021-09-02 07:36:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 34b1d94d828ff90c8168db23001317ac SHA-1: b07ac6738da5ff035f4cd76d1b824762be266c0f SHA-256: 59dd57f9b820cf759c467934270bd812deda01115dd9ce59210bd2ef838132b6
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple links to external resources, some of which are hosted on compromised WordPress sites. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's intent is to trick the user into installing a malicious browser extension or update. The embedded JavaScript likely facilitates this by either displaying the lure or downloading a secondary payload. The ClamAV detection further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 8

  • 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.
  • 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 http://tivati.com/uploads/userfiles/file/21485627089.pdf In PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da64f4a8507---fimerorojiwukogeniron.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/sabaj.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/51208289025.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/mixovukosupalisozegepo.pdfIn PDF document text
    • http://proxima-design.cz/files/file/pudiradedogo.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/07/03/file/18047286372.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/46915c4aefc67599a20116c06b3233b6/vinafuwesurejopi.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/goduj.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a8b946df---zuxutojazid.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0efc8196f0---72197133712.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/vopejexawuzapurene.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9ptur7jsqmf05dabk5dh42vq9m/gebabutulonojunetonexu.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/63372650432.pdfIn PDF document text
    • http://yuha.be/_files/file/jiwawebosowaziliwal.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/07/20210704093016.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160832a60aae20---xewunevuleganexi.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/78773206681.pdfIn PDF document text
    • http://lawngo.net/fckfiles/11183112467.pdfIn PDF document text
    • https://aljazeerahdrilling.com/userfiles/files/ralaxib.pdfIn PDF document text
    • https://ambalatender.com/upload/files/29689512269.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/44882634860964fef0baf4.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/pobefijokubedulobuza.pdfIn PDF document text
    • http://www.me.ntou.edu.tw/ckfinder/userfiles/files/20210714_020216.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/vejekelifiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=sr+kg+study+material+free+downloadPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c17c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17C 17784 bytes
SHA-256: 01696d25b6490f4b212cf442e92cce8ead649c203b52b7e6e48e4743da2e5224
font_01_sfnt_off0000f04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04C 11164 bytes
SHA-256: ef262a44fa098960b12b9fbccec1170c63512f6f1dc55cd4d87d7b089747c84b
font_02_sfnt_off00010a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.