Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebef9b3c20f17086…

MALICIOUS

PDF

71.4 KB Created: 2021-09-08 22:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a6d7f3969307a8af00943e4bf9dcdc0 SHA-1: 640677853f5a053c7f3da7c7d101cb705243d28c SHA-256: ebef9b3c20f170865aef2d93c9204157a59333ba9ade4a0d492185704a97d590
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs and the nature of the link farm suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://elitaliaweb.it/upload/file/rakuwegesexevopem.pdf In PDF document text
    • http://mea-travel.pl/userfiles/file/fuluf.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/32911046833.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/40880202319.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/94eb8256a7a82369b367261640848f8e/zabazulexide.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/2424de2de7c0e60698f17801abe7d861/14552982988.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/61666112802.pdfIn PDF document text
    • http://gptools.net/userfiles/file/67778516146.pdfIn PDF document text
    • http://hydrem.ru/images/file/fufusebixizejujera.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed4b162db2---59001992273.pdfIn PDF document text
    • http://rileyillustration.com/images/agency/files/86826507818.pdfIn PDF document text
    • http://anpharma.net/upload/files/88897743446.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/kusoxe.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/5b40c3a883d29cc128c96ced040c34d2/niwekupol.pdfIn PDF document text
    • http://seto.cz/uploads/vofajitezozovogas.pdfIn PDF document text
    • http://aa-nusd.jp/19192260358.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/84836037161.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/72970093272.pdfIn PDF document text
    • http://e-skala.pl/userfiles/file/23766925059.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/jegamipun.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109062043395383.pdfIn PDF document text
    • https://hiperaktivite.info/userfiles/files/61386868874.pdfIn PDF document text
    • https://ferropula.hr/files/wosadizofe.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210908014809.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/26812281203.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=flight+pilot+game+downloadPDF link annotation
    • 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_off0000ba1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 15076 bytes
SHA-256: d4cfe9adc56de092fabfc2a32495d728fb96bdf5ece731ade90e8d5971233994
font_01_sfnt_off0000dfb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB2 10636 bytes
SHA-256: 20bcd18f15dafbc1e55523b402b232a950b6d6b36814182825314186b92f7073
font_02_sfnt_off0000f79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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