Malicious PDF — malware analysis report

Static analysis result for SHA-256 834ebdd82e81c43b…

MALICIOUS

PDF

75.6 KB Created: 2021-09-03 20:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f0154fe2e85b856599fcb77b21e8aa71 SHA-1: 2ad7c32cbd1a421c30d893a737f2e0f5d2fb42c3 SHA-256: 834ebdd82e81c43b98452a8f658fa27da868143d64b459bccdf753eefad39345
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing operation. The presence of 'utm_term' in one of the URLs indicates a potential SEO-based lure to disguise malicious links as search results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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.
  • 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://garglob.ru/uplcv?utm_term=ethics+theory+and+contemporary+issues+8th+edition+pdf+free PDF link annotation
    • http://pnmanagementsolutions.in/uploads/1227327336.pdfIn PDF document text
    • http://paulbwatkinslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tipebopegowagosexi.pdfIn PDF document text
    • http://chamdure.com/DATA/files/kijudu.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/47849993761.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/26675994013.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/57533429848.pdfIn PDF document text
    • http://ewtch.com/upload/files/zuxamuxebokanebagizovebi.pdfIn PDF document text
    • http://cukorbetegshop.hu/files/kuretoragarijulivuda.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d653469d8b8---lumosow.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/jusutinugok.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607994b332eb4---48216625168.pdfIn PDF document text
    • http://cga82.com/admin/File/92453277750.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/55n7rfajof6b6906649p0m2or0/78140501931.pdfIn PDF document text
    • https://lifetides.ca/cambridge/uploads/files/befizi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16075cc6d89059---3901061806.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/85f4itc33ndtpo2elrqp0aamv2/60564788410.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/59592023620.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e407cd05e8---44541337415.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/937b09131179d71b12d032d7a03ac907/31540387314.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/fdc49ab718fe27e2ce9674cf01541932/40466640094.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/05c0b13a04abb29dd2e2bda1184969b5/18400969710.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/d2rpnhld84lqdg501bu7s3gj5b/32509850683.pdfIn PDF document text
    • http://xinyaoqiye.com/upload_fck/file/2021-6-26/20210626202020866675.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/mikumofatelepivikopup.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/221db7c168f25b0c21d7e782f749d123/18097333705.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_off0000c447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC447 16308 bytes
SHA-256: f778d28ab9b945c084c504584edf8dff4e00b2aabac2464772c3ba724910cc5c
font_01_sfnt_off0000ede1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE1 11244 bytes
SHA-256: 192b0b722566ebe382633c479f7b171ec5a8320aa442e088a7a6d69772426c87
font_02_sfnt_off0001081c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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