Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b30333322ffd06d…

MALICIOUS

PDF

71.0 KB Created: 2021-06-08 01:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7b06f1a059733920351aa85b17de2585 SHA-1: 918cbc08e0e2a420ddee0b919630b27267f2b5eb SHA-256: 6b30333322ffd06d76451238629b9e08f5650e56a0619bb81d892b286341413a
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a link farm hosted on compromised WordPress sites. The embedded URLs, such as 'https://wastran.ru/uplcv?utm_term=game+online+pc+hay+nh%25E1%25BA%25A5t+2019', likely serve as lures to phishing or malware distribution sites. The ML classifier and ClamAV detection strongly indicate malicious intent, suggesting the document is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=game+online+pc+hay+nh%25E1%25BA%25A5t+2019 PDF link annotation
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/1278eaf58ad99424122d119dc15f0322/samotibewuwanobaloz.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/wibusewum.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4dc9cbda---83473925472.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c6bfc31bf---84624319758.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160859f953abc9---47272798924.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607ee69ee3fa0---18818005454.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/135d7e49f4dfbe7aa5108df732e90fd6/23279426543.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210428140021155.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/e53a34f533e947d68618c8d5da01eff6/gavetojebemogedosewopa.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/374e61daa73833c46611661c1aeb325c/28482310262.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb246c14bc0---12756760247.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c27479016---kijorikiv.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/4ffe1a2962420339c31b69e285f59e04/wuxiloxafe.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4eb0d91c2---78026585466.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a054842a0a---nalasigasikuza.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a454f91995---92797495211.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bee720e16---tetoselawifog.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 5776 bytes
SHA-256: 16155a0817c279590d90839740af65c8f1fb1282726e3aba08fe63add23cc2a7
font_01_sfnt_off0000e6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F0 12072 bytes
SHA-256: b5fb84d736037e0393f62feae9ae7b9e36b42d7e4cf13c8d22589b2b105430bb

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