Malicious PDF — malware analysis report

Static analysis result for SHA-256 599c0d569296a9da…

MALICIOUS

PDF

88.4 KB Created: 2021-09-19 05:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 46c58d572e697dc61d04a66c7b783ed8 SHA-1: 48734b71ead8ac8ffb517b1d786302df0e349c17 SHA-256: 599c0d569296a9da049f7ac62b69467ea76571cfbd5e24eed5710644c20449be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are structured as a link farm designed to obscure malicious destinations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161316be13904d---53202302642.pdf In PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/48462023260.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/wajobuwadowobop.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/tugab.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/59034641680.pdfIn PDF document text
    • http://espicycooking.com/files/file///56116164061.pdfIn PDF document text
    • http://jjkxmy.com/upload/files/202109161611216784.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/vudakunuwosusi.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/lilebamivenefefibi.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/zazag.pdfIn PDF document text
    • http://www.boldino-hotel.com/ckfinder/userfiles/files/fakinu.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/roluwumonivugolowaz.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/sezewazibefoginokeni.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/72944272320.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/39108487600.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134b09c4d8e9---64260022841.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/dolupusesepefa.pdfIn PDF document text
    • http://hamzalegalservices.com/userfiles/file/52733111508.pdfIn PDF document text
    • https://trungtammatnamviet.vn/upload/files/jadasijatupediborosisober.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/49864865486.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/34131480846.pdfIn PDF document text
    • http://tns-china.cn/editor_upload_image/file/16251556647.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/derepixomodabevorawuze.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/33981845285.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=watch+let+it+shine+full+movie+online+freePDF 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_off0000f345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF345 18304 bytes
SHA-256: 7c30d1ac980eb32907496e0ff08f249c26edbd43191b331c4e5ade5d6d5710b7
font_01_sfnt_off000122b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B4 10760 bytes
SHA-256: ca6fe118a9d0bf4d9887df2d0393846b16874c9b46f206a736b6479851e5d775
font_02_sfnt_off00013b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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