Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54896710c3a7ee3…

MALICIOUS

PDF

96.8 KB Created: 2021-09-19 18:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a04fd9311dc00dbd7ce29bbd2644b024 SHA-1: 1a23851ba2fbdd2f45b243c03d2743c3d8ca71d7 SHA-256: e54896710c3a7ee3d30320e67a968cbb24a908f31cfa18cf034d8adbbb403c5f
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. Several heuristics indicate the PDF is part of a link farm, directing users to compromised WordPress sites and other external URLs, likely for phishing or to download further malware. The ClamAV detection and ML classifier strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://wastran.ru/uplcv?utm_term=the+hidden+life+of+trees+book+pdf PDF link annotation
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161387d526a2d4---92196700427.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/32101879345.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/24979785391.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135b9d72c53d---43291889827.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/lores.pdfIn PDF document text
    • https://denimder.org/resimler/files/ratiruzorebaz.pdfIn PDF document text
    • https://iagclaims.endataclaims.com/ModCoreFilesUploaded/file/gipemenavudinerirafageri.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/vubijavi.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/fd2dbf5e715d3da15297268cafa5fe0f/koposonizoseboje.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/59963901262.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/93542525764.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/jusapexujudesofuzite.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/89152634341.pdfIn PDF document text
    • http://modern-pro.ru/files/file/razupumawamaxe.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/41330667940.pdfIn PDF document text
    • https://www.gico.ge/ckfinder/userfiles/files/28828147668.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/lulutepituro.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/veniwawuxoxagujuj.pdfIn PDF document text
    • http://mp-journal.com/media/file/1922033947.pdfIn PDF document text
    • https://pavillonwohlen.ch/userfiles/files/17858923964.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/30330458283.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/60189675593.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///bodozubewin.pdfIn PDF document text
    • http://tes-sys.com/uploads/ckfinder/files/20210909/16311889694654.pdfIn 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_off000117f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F6 10628 bytes
SHA-256: d1174b328d7507efef3285b8dff8acf63a6484639c9956365424c69dbf6d1fcb
font_01_sfnt_off00012ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14806 17552 bytes
SHA-256: 62dfa0c8139f5071bc8c7e8140d6f4e5a9f845c263360061af896c8dbfef0795

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