Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47d0d366331271c…

MALICIOUS

PDF

93.0 KB Created: 2021-07-29 23:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 24d997d13140344775de8481f4c8c94b SHA-1: 192ac9d1152cb972303a2859e70a594c77d10ee2 SHA-256: a47d0d366331271c29f2ea310a09045a75c2ea00219d245a66b0ed53f8d50069
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • 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://cornerstonelaw.eu/userfiles//file/34807088640.pdf In PDF document text
    • http://www.kotolantopeni.cz/files/56110926688.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607125efd5d9f---powowemakivod.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/veekjjrfbgbdngbiaadttdmc8m/gekovovazorapuvopixaxapon.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/metozekewuga.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073b7f0be614---12392509183.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/41154162254.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b979be2755---28970107056.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/tinedarajexekemazaw.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/70001957479.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ff94cf6c3---siliguzujiv.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/tazaxiniligogigijep.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/10f59276e819b2a9e95269a52b03fb81/70157982364.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/zewivizibasif.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf88915f8c1---29641558938.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/29642341627.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/f93877dec6da006b810893334d624ba5/nedajup.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/49631137506.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c32b066f88a---55012160614.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c92d8d76cb4---91927957559.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/38342403896.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/vudagi.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf1f8ab7ed---rewuzibatusikaxijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=best+indian+veg+diet+for+bodybuildingPDF 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_off00010868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10868 16956 bytes
SHA-256: 1ff4e3c5746a2d55c60aa19264686d06bc9e67d06ce1ce5f63e35b62e388c4f4
font_01_sfnt_off00013475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13475 11000 bytes
SHA-256: 05de72d046d2cdccec22913c8a18b90f568e9fcc85785168e46461c39c2a65eb
font_02_sfnt_off00014e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E02 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1