Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ada151fdba5e38…

MALICIOUS

PDF

221.6 KB Created: 2021-06-18 10:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 249c0242fdf74e6a5184caf909404f50 SHA-1: 5d7b032746fedb3c4863fd00d9780d6e1bffc6f1 SHA-256: 65ada151fdba5e38352a93e740e87f57e86fab32fc5854aacf6a2c7ed1d0443a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to compromised WordPress sites, suggesting it's part of a phishing campaign or a distribution point for further malware. The PDF structure and embedded URLs are consistent with attempts to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • 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://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45a7962b7---setajukuzozogakogexum.pdf In PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e9bd1aec6---56643002734.pdfIn PDF document text
    • http://mtcongnghiepxanh.com/upload/fckimagesfile/jidonolotatu.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/v1as3csj3eo9fqvksncmes4g03/sorezujuzasabifepiba.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2ee66cf5c627d2ec993cf38edc6a4cc8/89545024903.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/53377674453.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609c885936707---zabam.pdfIn PDF document text
    • https://soechi.com/userfiles/file/nomutotamexuvilimikiga.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/j6fcgulaq4cg1p5q8lettgc124/ratotixu.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/vafipagobuvawumafafevu.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b11d5c68d21---73017147813.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/af3dfd1f3d473bbf09560c2d4e72c8a0/molewixelegezuviwo.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/57007930163.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f18513568---polegomadudodanugu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/h2vubdh9h38vgu5vkaa16pdnai/tefozodenubojugax.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87af31738---65284096675.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/muzomevumelelusosokefinur.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=piano+ledger+lines+chart+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00032fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FA5 5420 bytes
SHA-256: f3e67932ba69d940d40fedd40a1d400a79afb47b2e7a3cde827eb768ad03dbe9
font_01_sfnt_off0003420f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3420F 11912 bytes
SHA-256: dd451887d0291e71ce02f3768bfe082b5fab82d7332d46837544df932dada3e2

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