Malicious PDF — malware analysis report

Static analysis result for SHA-256 479c4d0b52a2555e…

MALICIOUS

PDF

123.5 KB Created: 2021-06-11 21:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 4b1609c10d9868d6adcf68ce8d1b2300 SHA-1: eaceefc5192802b37574521e192348364c4f6f0e SHA-256: 479c4d0b52a2555e25d0bf380e751e51f56897e8a1d133b7597ce5278fab26fb
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or phish users. The presence of 'pokemon sword and shield download 3ds' in the document body and URLs indicates a lure to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/uplcv?utm_term=pokemon+sword+and+shield+download+3ds PDF link annotation
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ff9efd58088f88d30edf0eaa3ceb03cf/54498977606.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c50d5191c---fetoxa.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/97977198803.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/9f80667f61e317f1a012806e515b1aa6/83628665824.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/7n3fshs4u0kfv5vhq30cvh39n6/sawipebagokumerogaxun.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/0fc760d69204aedf9614db782595ded1/dusodoja.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/6487f99d466447a087823e8b1e0746d5/48576933699.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k7fksmh2vcch4jk8an7euauuc6/67310781151.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3c7a25f45---mobigebinovirifabaxet.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/dd0a219f0a8a678828bf2ec5f9633f75/poluvolozikasuropur.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a974b497aa0---fexivesekisun.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14b983e71a---21798331485.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/59933448250.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/8785414640.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c65df265a---lojuxogulerutixixuza.pdfIn PDF document text
    • https://rugsinc.in/UserFiles/files/90892689809.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDC 27512 bytes
SHA-256: 6d65eba996453ecb4d6645dfd91f2484bc61061d30c141ea2da0aaf1069c7a69
font_01_sfnt_off0001a3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3F9 5388 bytes
SHA-256: f3efb488caa22d71218b1741e67505a04670eb9f7e13e1280daf9ebf87ac02df
font_02_sfnt_off0001b637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B637 12280 bytes
SHA-256: e5b120db76901306f3c5f286273b79776f6bf9bfa5f441353cf08ee083d28421