Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6cc11c4ed18f8e5…

MALICIOUS

PDF

68.5 KB Created: 2021-09-20 11:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60b15a33705594f11dc5641d9c4ffb1e SHA-1: 289fdc4dad8a72d355065adef43862b70f03e71b SHA-256: e6cc11c4ed18f8e5f6b22eece5e9d0c0a7e4f10d12b77ecb97f90df7560c5aa4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. Additionally, numerous URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malware or facilitate phishing. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • 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://crysiq.ru/uplcv?utm_term=ds+for+android+apk PDF link annotation
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16137236a396bc---rotiwilixeputabag.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/lesimuritu.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/palimuturili.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/niwomipofibiwesaxurelowi.pdfIn PDF document text
    • http://rudolphalexander.com/uploads/files/tewipomotajezukekiziku.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/kojelezositobi.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146803203d10---88585897035.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/84928210957.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/1880139617.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/pewofivifalododudozatu.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021914611229311.pdfIn PDF document text
    • http://sor1310.com/userfiles/file/kutoledulenatik.pdfIn PDF document text
    • http://mlmrockstars.com/ckfinder/userfiles/files/bunofivubutenigopagujezu.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/26421858873.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/af2b6c244c2393a8b037e8b0a6280d70/86278324261.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/17bbd07ed799d7622b8d1c201e2a1f97/83290632734.pdfIn PDF document text
    • http://xn--9d0b102a6wc3y4a.com/sa_upload/userfiles/file/20210905173555.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161361d36a7edd---vazozunorilef.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/10034140658.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/tukibuvamodazasedezotubak.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/gefofemutepujutoma.pdfIn PDF document text
    • https://jaukiaplinka.lt/ckfinder/userfiles/files/lenizevimuburuzarobokusef.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_off0000af69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF69 15160 bytes
SHA-256: ab37f8a67e672759142af28d6ee9ab1c5a663d95b9f663742e879ba08330f8da
font_01_sfnt_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 10308 bytes
SHA-256: 525ea4c14dd7d8c1bb449c851711ca6a98b89325a745e1190eafb4d249d96b84
font_02_sfnt_off0000ecdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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