Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fff5d89c0e69d33…

MALICIOUS

PDF

87.8 KB Created: 2021-07-02 11:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: f31f0d74f4a0042d9ffb714f8b2f278d SHA-1: 045d31439b503101d4c77c86a887ad1c9a74403e SHA-256: 9fff5d89c0e69d338afb7f0ba804a08adcbf32959304ddb6bfe6f5b871beb992
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://allytemp.ru/uplcv?utm_term=best+free+pdf+creator+software PDF link annotation
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/coma056rjld0p5v8dc6go4oov6/gidupovosozop.pdfIn PDF document text
    • https://etcbt.com/userfiles/file/pijemafoximuvipatemoremiz.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/minezosivatedurijitekiji.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9206d37f27---47048505990.pdfIn PDF document text
    • http://jarosi.hu/files/file/vitiwolerabepodiz.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/dazasivelojufo.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0d80533138f85b26fb20f062285ba265/wiguzuwedowudepilezoluko.pdfIn PDF document text
    • http://isystem.hu/ckfinder/userfiles/files/3216293308.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/0e1c07028caeb061ce415d772daab9d5/98796103257.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16077967da0e53---32157581173.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/aab2ce19fe60b31540f15e66359af7f6/28704802160.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/1c1d4aa79aeae9a7828ce0108c85ed77/40832628901.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160739d77a3b43---50204815272.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/12327925843.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b1b03b2a228bb3553b7101e3feef6bf/22476853677.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202106271648062908.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/bomitimexililejo.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d20c1aeaed6---fifage.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/43bc9e68f08a45cb81886e3b84b67e83/paliji.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0507dd974---pefixanadamixizofitatuto.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c9443d2d2537e93ff8ce237809ae986b/49638889198.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a6f59f953---nirutesigipupebijij.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/41k23ccbj7vnih6cj3r6q8luo0/38001062646.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_off0000f2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AC 10512 bytes
SHA-256: 2c6120e5b29ade80abe4549fa77b245cb1e427cc07edfe7ffc436bb3dd6672a2
font_01_sfnt_off00010ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EA 17336 bytes
SHA-256: 19a904bccb5df19b6d724a7515cedc33399dcfd2d3b9420168faa2a307cf650b

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