Malicious PDF — malware analysis report

Static analysis result for SHA-256 a726544e34efcb90…

MALICIOUS

PDF

78.0 KB Created: 2021-09-19 06:17:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a6e1a8cce820e255c529b879e90bc254 SHA-1: 2ece571af825ca8d4b7436b5bd7e8c544d1f9f00 SHA-256: a726544e34efcb9000253a3a99c0babedc37cdc264863831320ea15786f2847d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious content. It also features a link farm pointing to various external URLs, many hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely involving phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5019

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://oniceh.ru/uplcv?utm_term=emily+blunt+and+dwayne+johnson PDF link annotation
    • http://opersan.com/file/pusolejudodulimegevute.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/acf8b9f4a17a7b429dc623ea320bcc81/tipixowoge.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/gaxavuwaxeronuge.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0ck84ua2t46vf1bfk3m3dbrta0/64590467584.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/39308776858.pdfIn PDF document text
    • http://hotechike.com/files/files/75193937659.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614573a5e3fab---zejawumafowitimim.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/xujivemotimudifiwetuw.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/rukopemam.pdfIn PDF document text
    • http://www.hkimm.hk/_bin/ckfinder/userfiles/files/9369797967.pdfIn PDF document text
    • http://evo-models.com/uploads/userfiles/files/bitaboxutuvuna.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/c68c926d9c6c94d8aa1b73e35d4b43b7/46140528564.pdfIn PDF document text
    • https://drakbera.com/ckeditor/ckfinder/userfiles/files/74313074928.pdfIn PDF document text
    • https://alohasafaris.com/files/wodopetasabudivulagul.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/kubawagasanogomilixebo.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/90465757557.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16130dcc487c6c---namoguzusuxizovetaxof.pdfIn PDF document text
    • https://avenue102.com/uploads/file/35188650845.pdfIn PDF document text
    • http://playeasypiano.com/resources/fck_images/rilavepowifatesa.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/kebiguxivon.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e596a70b3---85374104531.pdfIn PDF document text
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/88830067494.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 10964 bytes
SHA-256: b0a7bc67fa887baf69c83f3ac793d54293a489288e1cffbe3a70d7ffe08a2baf

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