Malicious PDF — malware analysis report

Static analysis result for SHA-256 318e8add43296f82…

MALICIOUS

PDF

82.3 KB Created: 2021-09-06 14:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0be684c2652687489329e9151859cb29 SHA-1: 7852c327b84d5a4b03bd600ed9b38f7235881c40 SHA-256: 318e8add43296f823792da140f4e158419a4a57aaa587f8a09ace0ae352229a3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document containing embedded JavaScript, identified by the 'PDF_JS' heuristic. This script is likely responsible for redirecting the user to external URLs, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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
  • 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://mytalk7.com/_UploadFile/Images/file/47918240698.pdf In PDF document text
    • https://amd-export.com/site/upload/file/67685518251.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/mabakedanizuzebar.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/9eb0128c6f591e7fa90b4affaf2e6fc5/80857262591.pdfIn PDF document text
    • http://carscaso.com/js/upload/files/53421827107.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/57455725094.pdfIn PDF document text
    • http://fitviewer.de/files/file/10330191693.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae6cbb965---fedizowutiwefubatejedoj.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/8vnak2c8qdg9ottkt4qe2cosri/94818171653.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/151ae8759b80d58e7a7b2b76e44e899c/fugelixanesenowubulasa.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/dujejodovazotusafoxolorev.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/88137681319.pdfIn PDF document text
    • https://signika.pl/Upload/file/piwesezinexuzokobi.pdfIn PDF document text
    • http://cosmeticdermatologymiamibeach.com/uploads/data/files/nikivupakokusu.pdfIn PDF document text
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/62191833924.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/81758244256.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/7b9mamu0lrnpt6um4p1cp5funh/xoxonefazodijeg.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160ee276d15f2e---69551716258.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/a70f64b76c81c44d5cb82edde33f0586/69574026272.pdfIn PDF document text
    • http://cloverdiamond.com/file/17949560481.pdfIn PDF document text
    • https://coebmsf.com/userfiles/file/76505691104.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079883d3a211---44138051480.pdfIn PDF document text
    • http://pphu-joanna.pl/fckpliki/file/19291401789.pdfIn PDF document text
    • http://changecn.net/ckupload/files/30603363814.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=evenflo+manual+breast+pump+assemblyPDF 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_off0000dcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 10832 bytes
SHA-256: f99b3d08bea9c19dbe8454a523c01432a16ec0f49d74a75c598ca77c1789685b
font_02_sfnt_off00010dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD6 17848 bytes
SHA-256: 17bf5b2b688726fd16c41b5ab1e4db17efa90e36792beb0e1520ca306f2cb0e9

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