Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7acc39c2ce0b50…

MALICIOUS

PDF

87.6 KB Created: 2021-07-07 21:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 3a09191cb5f617bac25f9c8843fe5651 SHA-1: dd8db02af0934f9ddf050dd145043db3d1ef3f44 SHA-256: ac7acc39c2ce0b50ca2a731254673af6c15832cee2707905d284097dda710968
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains numerous links to compromised websites, indicating it is designed to lure users to malicious content. The presence of multiple compromised CMS upload links and disposable hosting further supports this. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://coretry.ru/uplcv?utm_term=two+truths+and+a+lie+worksheet+pdf PDF link annotation
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5e8a95e87136c7c031de9c65eb57a992/39371131166.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb23fd70cc---fesikowedironimoranevixu.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bd6525f1---derefowumepogodofetidoja.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/a368819c3be7c69dc7816cd3d49aadd9/57832969352.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3248811abb---63703396810.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/82c6f6977f7b55a59d8cac7ede8addfc/93048788106.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/r6iakb97r0ofl09cbe9l5dmpr8/89428973020.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76e855cd4---zisepatilaturoxo.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af83cde4574---wunikagejanakesi.pdfIn PDF document text
    • https://ecoretras.com/file/raturasawitononukesita.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/61454190189.pdfIn PDF document text
    • http://sportgalaktik.sk/userfiles/file/29644054176.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/98657786566.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/1fb294a4e02a18f501eecd0bd256122d/81364158583.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/1tap8610p8bvj6aksb1sof1irp/pukifavijuvogudurepe.pdfIn PDF document text
    • https://somogyplusz.hu/files/pufupafonijafiti.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/40674063960.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/55343982033.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/86364237106.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16098e7ef5a262---78906942499.pdfIn PDF document text
    • http://azizolace.cz/images/file/55153452758.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/a862c14ef6daebac89a069f544e27f7b/96646473031.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/gejebusawuvagozerexoni.pdfIn 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://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_off0000f24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24E 17460 bytes
SHA-256: d7cc94838236cdf9fc0b863573fa2db3757a24a0121af715dbd4c1625e55e832
font_01_sfnt_off00011ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF5 10836 bytes
SHA-256: d3d842911b93c2cff386ea769a7485877c6d54215ae78ddf97d815a0caf4cb50
font_02_sfnt_off000138f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.