Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17ffc2902e1f824…

MALICIOUS

PDF

83.6 KB Created: 2021-09-08 09:11:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e22b77a933966ab543d39bebdb588b9c SHA-1: 527a12e3528332757fd912efed52ce60b8cd4eb4 SHA-256: f17ffc2902e1f8249176c878ac837e0a0a9bdb90b0604acf7ed505e0f3eea743
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for SEO manipulation or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL distribution suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://naitikfashions.com/ckfinder/userfiles/files/48661952172.pdf In PDF document text
    • http://shukokai-voves.fr/userfiles/file/16238109692.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/62332b335d50fc4109a6d7daee4cdf23/wobodebejuvegijulejed.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/xugujogowodebir.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160851be22703b---2344920715.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/uvb1brs74495i757qabduq0tmj/sevenetumewesom.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fegakatagomiwerobi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9112a0c26---remev.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be02d8867c1---15466299137.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/mufoxovepaxo.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/21432464577.pdfIn PDF document text
    • http://setadijital.com/img/userfiles/files/68675511164.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/v17t0nvvtj4i6tqb5gvj8s85m3/laluravanixezo.pdfIn PDF document text
    • https://ms01bet.net/contents//files/32603504224.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/12470098883.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b26556de2b4e15fd5db7daabdbaf15a/sidur.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/4f560f374e7e1a25a4e84edc37694f15/22627289336.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/vewiboxajugikap.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/03101026507957da51782afd882d6ce3/gusajujurimisurixubutage.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/65745321299.pdfIn PDF document text
    • http://quatangsongvan.com/hinhanh_fckeditor/file/kazuronimexijiremiw.pdfIn PDF document text
    • http://sooclose.eu/upload/File/fexuvoku.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///40565188233.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/39391339442.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=interferometry+in+metrology+pdfPDF 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_off0000e4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CC 16924 bytes
SHA-256: 9e885d9ed9ee39371a6513d41225f13fe3757a62e5d5da90a564f266dca0476b
font_01_sfnt_off000110e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F7 10576 bytes
SHA-256: 8355f1a40832921f9e1753b8b8621f322d807bba27a759de227978c1e7a9a814