Malicious PDF — malware analysis report

Static analysis result for SHA-256 617ecd7b9123742e…

MALICIOUS

PDF

72.6 KB Created: 2021-09-03 09:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 49366c365175645b4137d879d9c1de56 SHA-1: 5a467d260fdf96c4f68b2d90f0bc4db2a90b247d SHA-256: 617ecd7b9123742e776d3fef75bf2f90cceb37b51094e4c0755a43f4e77302f4
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the PDF structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/o5n537j9ktr15dmvkhoui0n427/rigoruveburul.pdf In PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9e2420ef3---52007860122.pdfIn PDF document text
    • http://laros.cz/UserFiles/file/99876082826.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078a667638ca---75108530855.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/v2gtnile3f3cobus8vjeu54g1e/3617075820.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c084edf0f---watoneso.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/c29c8b5b1918a0e015a273e8a7908eae/xilanolisidas.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/83566444792.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6eb7668846---zefirani.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f1807a8a1---95242746496.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/jadonaroni.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/bf0507f3a9805b8549e47be88944d26e/gifudodunarenorazarodoxaz.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/184725a67c015199967e31a8a78652ea/85847820777.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/3459036567.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/benolovunaguwodevukuta.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/89b4f3bda20d38af0f20c309ccd9db75/sukitizapex.pdfIn PDF document text
    • https://maria-galland.ru/files/file/99184644758.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/24208802175.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794ffadb44a---43264265880.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/s1uin2t0fs958njrk1tfpbk8oe/33677356618.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/1h5d09vab1ngrpqm40nll708o7/68294815122.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6a7cbb104dd79a8cb6bafed363b894eb/87292712723.pdfIn PDF document text
    • https://medtek.vn/storage/file/ruxigezuwevenog.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/nupapifa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=pmuy+kyc+form+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_off0000baa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAA5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BC 10284 bytes
SHA-256: 390d7c3682410af3fe519685c69f295f7bb21c680f8b8c2b2e0a51a63d369cdb
font_02_sfnt_off0000e9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EB 17380 bytes
SHA-256: 6a703f2db22ff9a4ae62a30ad35c3b5ea9787d71a6c347c33d9dcef8955cb5e6

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