Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3e8999903a839e…

MALICIOUS

PDF

79.0 KB Created: 2021-09-04 20:26:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 33a22f4a1ec006be7348055c87376dfb SHA-1: 5fa8d2dc388c446d9f5fef033ba912225f9573c3 SHA-256: 2f3e8999903a839e516cb272f2be84fd985d59dc16b7a7b858b1241b86ec71b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links to external websites, many hosted on compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the PDF structure itself point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/j1rulvpohs36kd15va7atnv1g0/87251970536.pdf In PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/e2dc5bacb647b668434b954503df1650/nivitesa.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/5a731c69e5806d29aca0bb067f852663/puduvozuwudem.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/5ebd7d70368ce2c2d8e0d451aa8702cd/fipixos.pdfIn PDF document text
    • http://avanti-kuhni.ru/upload/files/tapawegomat.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/5536550071.pdfIn PDF document text
    • http://vickerycarpet.com/uploads/images//files/balojiwelidum.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ece4eb0039---98927110824.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/xozidise.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9429a2cee2---tapomebasowepipeno.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/bubomowakefavixuliwetizuw.pdfIn PDF document text
    • http://goldenpeak.it/userfiles/files/68339188035.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e2760674e350c0ec01133eab43d7b9be/61743838085.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/67007699471.pdfIn PDF document text
    • http://agro-norwa.pl/userfiles/file/86584087199.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/34b6e24b60bd1baab91aabd48521e3e8/bulavaje.pdfIn PDF document text
    • https://prosaison.fr/userfiles/files/mekepanajoresegufufi.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/ac7b3fc8fdd1b34b4367694064c5be7d/guduzobupivisowita.pdfIn PDF document text
    • http://aweibel.com/Photo/file/remuronitu.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d62679e213---votizilimakimikapixov.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be864c674f---nidolerigimok.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/122234035ec9eb2d4696b5d7e096b8ea/15421702134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=taula+periodica+dels+elements+catala+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_off0000ce02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE02 18700 bytes
SHA-256: 75795a44ed164ff350ef5062864c637cfb162f9cbdc2c2a3fee5ac04785cbaf2
font_01_sfnt_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 10844 bytes
SHA-256: 78f3756cbdbf41ac1e3488c3b88015623f56d972f2a654f7c82411371b87c305
font_02_sfnt_off000115d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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