Malicious PDF — malware analysis report

Static analysis result for SHA-256 02090ca25cee9c63…

MALICIOUS

PDF

95.2 KB Created: 2021-07-29 20:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9358eb580314f3a7fdb3e48118a99c23 SHA-1: c8aa72253eb09a7e64cb6bc362ba81e675b123c5 SHA-256: 02090ca25cee9c63d1998de974f8aaf356edd54de5159bc675c248907a4f454c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs hosted on potentially compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate a coordinated effort for SEO manipulation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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 http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bec9d046b96---xelusunodu.pdf In PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/57b1ce978ff43a0f1c05d1790b4172e1/piwozijasemufir.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/duwavaj.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/644f042eaa220f34cd3fd7ebd80a57f2/wesizudebibomosegeg.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/138e041b2b89162430a00e6eb4950aad/liwamavaranutinuxup.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/98539491334.pdfIn PDF document text
    • http://teraval.cz/res/file/derenaw.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/44980041391.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57845426b7---73831671168.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/eaa32dbce246b18ee5c3d115aae0ddaa/varegeto.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/a6cb5a912ddaf6fe993e206a99336e25/88408621174.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/bexufogutagikapekifaran.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/7461503cc508a25a82b0269a1eaee9e0/49991430554.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/96118595470.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/tamazetagivabel.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/17756949007.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/11206274360.pdfIn PDF document text
    • http://sevinctekstil.com/resimler/files/lixepapifororabi.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609987c0c6a13---19517818866.pdfIn PDF document text
    • http://datajournonepal.org/files/sukupovomenorumasagebile.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/fef619be210c56d5aaf50e1221e5c1d8/72683327665.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/dd1beba9424aca0b5dcad4f763cc8d64/divurokiligavugozove.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb641b9de2---tokoxeja.pdfIn PDF document text
    • https://ajur.rest/uploads/userfiles/file/78049024919.pdfIn PDF document text
    • http://normel.org/files/upload/file/12825404585.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/14282232209.pdfIn PDF document text
    • http://swaving-stalinrichting.nl/ckfinder/userfiles/files/tofeju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=christmas+movie+quiz+questions+and+answers+printablePDF 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_off00010d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D75 17608 bytes
SHA-256: 7867eca752728f013d36d268ffc764e32a7dfdc3c2b50e03080da43580d8cf01
font_01_sfnt_off00013b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B6B 11288 bytes
SHA-256: 721e473f3700b3aeca76e951c1abc37667f51d2323642da5fb264d2ab89a6b95
font_02_sfnt_off00015568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15568 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1