Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ed679faee1f753…

MALICIOUS

PDF

73.2 KB Created: 2021-09-02 03:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 37ac806b10098b2f0aaaf13721a6efb4 SHA-1: 9cc0312fd159f8471b2db127230a118628b0d6ef SHA-256: 10ed679faee1f753df74512b0db3418241cdf17596cc5c755b7673b3f236bc33
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a phishing or malicious redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to exploit vulnerabilities or lead users to phishing pages. The file's structure as a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://parkwaywest1974.com/clients/861606/File/33214954128.pdf In PDF document text
    • https://okna-kursk.ru/page_edit/_samples/userfiles/files/46265083225.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-6/file/kexevorosanote.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/vagojujigolixusokitoj.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/nadinewe.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/34855350256.pdfIn PDF document text
    • http://thienlongadv.com/upload/files/nerenuwujitube.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16115dc68bf055---xotaxijekemezexifed.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/65546876465.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a153076af03---69941940278.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608f47a22a07f---89237303574.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/5v79e0icelns28dl8d0t6peju7/26732925099.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/i5algm2pbig3lkdhsog679uf6c/15375051981.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611f1f30b451c---vanobifitemikuliremezudap.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/ndrqccc3ufsehntqehha4a5qvb/94452481392.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/b4a8001dfcbf3debee59bfed4f305018/87238165351.pdfIn PDF document text
    • http://ekolojikweb.net/upld/userfiles/file/gijojuz.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f428005795---65225054800.pdfIn PDF document text
    • http://fittbike.hu/files/file/35061393884.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a85b4ece4---xijadituvitip.pdfIn PDF document text
    • http://scpt.it/userfiles/files/43820215164.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/menapasasebal.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/1609a49c001124---59730596830.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/sorokemiwupora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=justin+bieber+and+haileyPDF 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_off0000bd7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58C 15856 bytes
SHA-256: 001c9fdaa176fb8101735340e298ce0de3e6145d5629fe826ec2ce74f697804c
font_02_sfnt_off0000fe4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4A 10572 bytes
SHA-256: 48368c9c48ecbdca3f07c43767750c5153a0cb2836193da0759b4652710a2941