Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed59e2e34d98be1…

MALICIOUS

PDF

86.2 KB Created: 2021-07-16 09:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 99e7495ed5f6d5c7cd82715d3a007b2f SHA-1: b430e4c034b8892f0d40bd544eda9298a50527f6 SHA-256: 6ed59e2e34d98be1e07ebfd6654a2bb8435d55a9c2f15929befe53702273969c
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links to compromised WordPress upload directories and disposable hosting sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to exploit vulnerabilities or deliver a secondary payload, likely via JavaScript, to compromise the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=destiny+2+trials+of+the+nine+weapons PDF link annotation
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/bf2f70cd254f1a43d938384eb08906fe/nobekobubozura.pdfIn PDF document text
    • https://sinarwaja.com/account/files/19955353370.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/21dd1c1af6672fc8fec5313a9421481f/94355866020.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089e3a2bcb79---zakar.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607192be5f22d---62546988372.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/36599944275.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d702e67698---mezerufudufaduvib.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/25810046267.pdfIn PDF document text
    • https://sokolzgierz.pl/web/uploads/files/jivinax.pdfIn PDF document text
    • http://52fotki.ru/ckfinder/userfiles/files/12632526463.pdfIn PDF document text
    • http://cdmatik.com/uploads/file/vafarenelawaka.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/kijowe.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vabuzukoxotimugu.pdfIn PDF document text
    • http://svx.su/ffile/file/bivomufevifale.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/baa86a9a075fdd4b20cd16480180d126/dubukawaviwigow.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/81203525230.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c053397c9---puxeduduzavazevikix.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/61149964025.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe4124218b---debufusoduxudemerizi.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/25616920477.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/xewaxabol.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/ugd1ao7lf7ld0j9jrifh68uk1k/jividitova.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/tigibasire.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160ade4d3b48e7---81942591387.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c484591e515---wefujozewitidizurobipa.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_off0000eeb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 10776 bytes
SHA-256: fed6f886139d90a35e2ff486270c20c8d55c2e2f53de060464274a481b4b151c
font_02_sfnt_off00011fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB6 16652 bytes
SHA-256: 4d838160817306574d3dc0dfabdd8cead2cd29fe8abb6f2f4820f8d04c7445c9

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