Malicious PDF — malware analysis report

Static analysis result for SHA-256 62e917bc0a6334ba…

MALICIOUS

PDF

87.4 KB Created: 2021-09-09 06:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e103be65e460a1064225ac3a2c62f393 SHA-1: 6ae23058f2651b80a3a49495871d70ec7c6cc0db SHA-256: 62e917bc0a6334bad61c7fc70ea66a377cec12a452a4d41a03b4bbaded5234a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

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 http://tbff-bygg.se/img/files/geginumarevamusiza.pdf In PDF document text
    • https://10s317.com/uploads/files/202109031013338354.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/9e3e3a3185db4fa40a71be570bda1a25/lusowutanajivoxifeb.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/161302320a845f---4511972918.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/xagulabukafewojoxenujuf.pdfIn PDF document text
    • https://topupdana.com/contents/files/vaxuxeletugep.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/fububusub.pdfIn PDF document text
    • https://eurotig.ro/file/tijixejuwezita.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/80795853707.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/gadijogorilu.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/63946209372.pdfIn PDF document text
    • http://mawaevents.com/uploads/file/sugidafuwemuzepup.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/85c657754f462710c0fa1c56e698f78b/6092737469.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9db49be04---35405583989.pdfIn PDF document text
    • https://megatex.ua/images/uploads/file/13706359695.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/da8248d5951f4ec03c9b6299c2c034a8/nawajukubebov.pdfIn PDF document text
    • https://mosaicopeoplecorporation.com/ckfinder/userfiles/files/25914735372.pdfIn PDF document text
    • http://ysmenmidwestindia.org/uploads/userfiles/file/file/rexejedazujigelosanisoju.pdfIn PDF document text
    • http://www.photonics-science.com/ckfinder/userfiles/files/43139577306.pdfIn PDF document text
    • http://coeb.eu/userfiles/files/mamilatisotutofofamuropu.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/kojajitebogu.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16138c20c15e0a---tejelemobevaratasu.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/damakobobux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=lucky+patcher+download+fs+16+hackPDF 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_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 11196 bytes
SHA-256: d9dc50c3070a6b8fe741ca13d920b57c1707ccf1af89e1314c40cf298db243d2
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001216e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 18024 bytes
SHA-256: 901d42c4d1004185fa3012d2f9a86b1bc4bc7dc00b9d70347b753238b170c3fa

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