Malicious PDF — malware analysis report

Static analysis result for SHA-256 c465f25e2118b31b…

MALICIOUS

PDF

77.6 KB Created: 2021-09-03 14:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f8b6b932383c665347779f8e03fd4995 SHA-1: a29e4570c9ec9bcb06bf2484563fc876ee530fe4 SHA-256: c465f25e2118b31b3ca84a7c22d0665d4db2660200388038a9f7c606678046b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised websites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious content or phishing sites. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://aarogyamedico.com/userfiles/file/ramizapagirimizep.pdf In PDF document text
    • https://jordan.si/dokumenti/file/kufavajapajenapokosuzifo.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/6bc881ffd1ea69a3ac55a66fb660e7cd/53529191826.pdfIn PDF document text
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/41115971821.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/48674699233.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/zowatefexelatawoxevag.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/50ac22633a807e91785460508db6c5b3/6223643525.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0584938001619768020.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e73e99b2d5a---xilum.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ljvk0mib3veo5hpol9gkcjks7b/lonolajedamatunabeguge.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/dirataxezi.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/r8j3fdhs0thmabclg4d1bq52qd/lobap.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/perudevusowikejiwudo.pdfIn PDF document text
    • http://nationshield.ae/userfiles/files/saxedupubapemonamog.pdfIn PDF document text
    • http://lejonhund.com/upload/nodasirijuramavevema.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/63101190010.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/wasubidosuvowiwej.pdfIn PDF document text
    • https://tessuno.com/upload/files/6128dff0986df.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161273867d2e24---nugibinadokasas.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/potimuzerizibaxajalobugun.pdfIn PDF document text
    • http://dailynewsodia.com/assets/ckfinder/core/connector/php/uploads/files/25361975155.pdfIn PDF document text
    • http://denki-shonan.com/uploadsfile/jojejavoginubedasalum.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/80b9d59abb3e7ff5169452bfc06c41c6/8597542867.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b52411404e8fba01b9534555fe940202/91110845542.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=citrato+de+pot%C3%A1ssio+bula+pdfPDF 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_off0000c895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC895 10836 bytes
SHA-256: 08101abb04c54aab2f2455bd7b7bb8448d4b096bb6cfd2dfa5a7633f81af5549
font_01_sfnt_off0000e114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE114 17908 bytes
SHA-256: 69e4a68c1b0a3b9f720307125c8318751e7df47247be437890f794f31892dc30
font_02_sfnt_off00010ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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