Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ebc3342fa40ba51…

MALICIOUS

PDF

88.0 KB Created: 2021-08-12 17:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 102540bb585ef930c79d061e6bd0c149 SHA-1: c56a6081dc9c893d45b871f03ae6081a47a7a650 SHA-256: 5ebc3342fa40ba5126892903035eb23e0ec752078b9c151de102648d1c6c97c0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • 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.
  • 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://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a49126e1d32---27539086112.pdf In PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099c9c44da16---fojere.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/nojejevofu.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/tifadodo.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/7bff8e301e67bfae0a04c94684f6e6fb/18140003641.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608544aa8f7a1---meladudimubijotixowo.pdfIn PDF document text
    • http://autosvanbeek.nl/mindcms/js/ckf/userfiles/files/40392061317.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/nmto4hsprna5e5bt3jn5pn6h8k/ratajalejiwajasoze.pdfIn PDF document text
    • http://doks-films.com/pcms/content/file/83142048404.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210618052638.pdfIn PDF document text
    • http://snap-drone.com/userfiles/file/99092757298.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/gojaxofuxixaxi.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/76908140685.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c772973eb---lusisir.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/91191531045.pdfIn PDF document text
    • http://mylodge-naoshima.com/sigajutevo.pdfIn PDF document text
    • http://drjoecarver.com/clients/49355/File/xilumafom.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/bd6a665f6ef66bc6fdf90651b47e3f59/vasumijesaf.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/biponuwajelusesiginijoz.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/muwobujexavona.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/1miec6budlm49u85h2v5a3c8li/xapazuputijelifikurukegi.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/b2ec9ac9af74a038f46735ad3426e4fd/54156356351.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/617825207.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/5016ffaa311af2c3aeb2b0c2f11893db/66847289796.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+prepare+gram+staining+reagentsPDF link annotation
    • http://www.linkedin.com/in/scottvwsuttonIn 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_off0000f500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF500 16856 bytes
SHA-256: 115befc67f3e5114bc69288fcca2b53b00d5f6d3b4e7a244e919e3a3f1df4c38
font_01_sfnt_off000120d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D3 10624 bytes
SHA-256: 00d04b84303bee442924ebe9ce12afa66e54e0101862b8aaa9be323494eb4ec6
font_02_sfnt_off0001392a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1392A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1