Malicious PDF — malware analysis report

Static analysis result for SHA-256 59e8eb6cdcfbf564…

MALICIOUS

PDF

186.8 KB Created: 2021-07-24 03:44:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 17d36300f2c25296916a01e2f454eb60 SHA-1: 66f4dc17deedf7060ac0feb1cdc8b8cc31fe1329 SHA-256: 59e8eb6cdcfbf56408bba0574a48bb2f494e4c49fcfc919a26351724e04e7b25
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites used for hosting malicious PDFs. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160871c9ca3f76---27519287687.pdf In PDF document text
    • https://ceral.pl/ceral/pliki/file/8050961214.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607564e345cac---35561355854.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210613_D80D072D94F42E3D.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/dekeri.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b82e043e46c---dukabororavorekavetikal.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/82964488890.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7388562d3bd52fa3997d18dba361a993/48612235832.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/83840969993.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f5e065745---97999004361.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/9289449088.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/vudumotetilufixafebepat.pdfIn PDF document text
    • https://egf.tw/test2/images/file/gazamevomof.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/6v6rdqlsnq1vf5s42h5m18dg4j/82729181468.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/s2d5krji1h1vjfi0qd7lnt4vhm/fomila.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a18dfd0fcd8---riwim.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/dajoziwovugaruvesot.pdfIn PDF document text
    • https://allegypttours.net/userfiles/files/12451537189.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/pepuwijegofukerataf.pdfIn PDF document text
    • http://ehhs1969.com/clients/6/67/67a0fa02f482ea8575b7cec7429e43a8/File/61895106946.pdfIn PDF document text
    • http://azizolace.cz/images/file/mawazawi.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/reziworavimufofelubu.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/846ab6340456da2f09e64b0e651616d6/tizumapok.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/433f276092303f270a77590e82b40147/wagorojavejenoj.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/jixuwasegof.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/xazudeto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=thirukkural+story+writing+in+tamilPDF 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
    • https://tinyurl.com/tvmtvw8In 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_off000274a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x274A3 21196 bytes
SHA-256: fe550497a3445216089f7cf5a66f3d2c2bb1987131492d35c690c88f8369510f
font_01_sfnt_off0002a939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002c150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C150 10780 bytes
SHA-256: 8d2835eaad38add968e20184cea8cb23bb9de3f1910ff7a3125fda86e34c6ebf

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