Malicious PDF — malware analysis report

Static analysis result for SHA-256 bebbc45868a8fa9d…

MALICIOUS

PDF

77.5 KB Created: 2021-06-24 21:04:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4fdf4a09e3282ddeec0f05fab3797d27 SHA-1: 86ee627f73be2bf1b3d2dea47365e9c68de5261b SHA-256: bebbc45868a8fa9d302c6c1989007c43c7a43e34ea8067afbd4fbc319fa2c991
154 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed for SEO manipulation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9231

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.
  • 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
  • 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://firegallery.ru/img/upload/24323850021.pdf In PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c459c71b7b---82448673895.pdfIn PDF document text
    • http://sakem.org/userfiles/files/denamugivowilatenem.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/vanig.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16077e20c7d87a---kunikuxepukutovumuzoxuzo.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/viwesajal.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/acf2858d6c66668bab2b17a02cec1b0f/66697007450.pdfIn PDF document text
    • http://slsnn.ru/content/files/fabobugiwegowir.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/o2jdaeo9sgtqi9csfpn2qhr0ps/64598913126.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f1105f5e0---53993663749.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/51403832290.pdfIn PDF document text
    • http://candientushinko.com/images/file/59034075061.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/sirigi.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16078097daa62d---vejutez.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/judobixavav.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/ngfLrbzwjls/uplcv?utm_term=interview+answers+tipsPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF60 4872 bytes
SHA-256: eb2b988950442676a306e7e99a30db6a2d28c6856958d3ac6f72e678cf728dac
font_01_sfnt_off00011012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11012 11500 bytes
SHA-256: 21657d61edbfd27f1bcb3f9747b1fded86307671460dccfea13409169c994d2d

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