Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdaaf58b3954deaf…

MALICIOUS

PDF

77.6 KB Created: 2021-07-18 05:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4ca82abebe3dc223f38ccad0c1c8b84e SHA-1: 518833bcc9f2f6bac2f1613dd9bab630b39f47db SHA-256: bdaaf58b3954deaff121c454a4c1e18da2214bc08ad999f48b67d3afa18874ce
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites and other disposable hosting. The embedded JavaScript likely executes malicious code, and the link farm aims to redirect the user to potentially malicious content, consistent with phishing or malware delivery. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7248

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.
  • 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 http://brlairport.com/images/file/37658324302.pdf In PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b0396f287d879b7fea0cee2f62634566/79137250810.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210617_163706.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/jefitixaxid.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27989b3688---96592243263.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1b73c7b4---5812266704.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/10430617504.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/kejivedokikotizafegibe.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608f49d171e0d---79359137017.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b17303d74c1---kibatupiwapexixone.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/49701701831.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/11360721570.pdfIn PDF document text
    • https://gannat-ltd.com/userfiles/file/54031916959.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/fbc6ec1596ca7c1aad74bdd5d0555233/73703090201.pdfIn PDF document text
    • http://m2m2design.com/userfiles/1222288758.pdfIn PDF document text
    • http://cke.hk/userfiles/96342739455.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a49e055d3b4ca0dfab56fa0988ad6664/zosadofixipadozirek.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/e3f418d8fd93142543b2263c752f5666/jijudexexuxo.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/05504916t4fs822v2hv90gm910/velatu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c671a6a9b---vakimofema.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/31582760208.pdfIn PDF document text
    • https://loyallcanada.ca/editor_files/file/demenarinofexul.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609b76139f97c---fejupasusejobanemux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=fancy+hairstyles+for+long+hairPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F53 16996 bytes
SHA-256: 20e2903b81417e23a46584ac6bcea91d0a11ef91630f2195f854d36a443ffcc7

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