Malicious PDF — malware analysis report

Static analysis result for SHA-256 434b82db25b1a162…

MALICIOUS

PDF

88.0 KB Created: 2021-08-12 01:16:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ddd4f46d55e81fee5da5719b0cee1dce SHA-1: db2eb1ce07669778ef0c3bd6a70a51d025f40cbf SHA-256: 434b82db25b1a162f37fea0172b60a34e32ae5b1d4e7352784a9cbf55974a26f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The heuristics indicate the PDF is part of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://bertoniamministrazione.it/bertoni/public/file/47205889541.pdf In PDF document text
    • http://2ds-creations.fr/userfiles/file/6221082916.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/c17b28cffa36ebb2dc52ce2aaf7f6bf5/88081084388.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/28611278200.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/83c99tmmp8fhfpbksup7ln8qai/damukapibijov.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/mieor6n8b0aq8p7qi1862l03t0/tuluzozetekaponejuka.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/93078682159.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/jukagotuzenokefekazisuzif.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/32666279053.pdfIn PDF document text
    • http://48bulls.com/js/upload/files/jakajevinasub.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/bokaguxez.pdfIn PDF document text
    • https://angkaganjil.com/contents//files/25707614074.pdfIn PDF document text
    • https://seger.cz/userfiles/file/vupaxoforakajok.pdfIn PDF document text
    • http://shriadinathbank.com/uploads/pimupazanusix.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0f6d2e922---36661835252.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/15380762527.pdfIn PDF document text
    • http://promador.pl/userfiles/file/pikute.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea785aa28d---gotasuwom.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5f8911e8ba14c3c20a8636caabef8d68/dimigu.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/8c7b042ca3e6db99cca0da95db880edb/12743792896.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/vemopeginobajex.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/doropagibawewasujane.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/pabisuwikapekisesirer.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16077970902bfa---lenamozusoliwajon.pdfIn PDF document text
    • https://cian.hr/userfiles/file/jajajekofisaxaxewobawafo.pdfIn PDF document text
    • http://digifast.cz/userfiles/28892956092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+mp3+murottal+anak+perempuan+juz+30PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3A 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_01_sfnt_off0000f0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C2 17788 bytes
SHA-256: dcd71109264cb914db31565789275629e31d9629d22ea508058680b51d678b95
font_03_sfnt_off0001378f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378F 11056 bytes
SHA-256: aaaaa7e5230bcfdc2b953770ad10cf4c575c765613be0be8b2198e7aa129b838

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