Malicious PDF — malware analysis report

Static analysis result for SHA-256 9084d34fd2a02219…

MALICIOUS

PDF

87.8 KB Created: 2021-09-20 20:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3c10947b72bb97c624df9384f188f454 SHA-1: e1582c08a6e0710b1f509c6ec369829e2239f25e SHA-256: 9084d34fd2a02219461ea3664dad2a4d6a4e4b92172f916d817ac409616cf904
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The embedded JavaScript, while not fully analyzed due to potential obfuscation, is a common vector for further exploitation in PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://velomagazin.hu/UserFiles/file/ludadovozopudavoje.pdf In PDF document text
    • https://at2-turbo-j3t.com/contents/files/18038992552.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614521baa5c5e---jirawe.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/mrlir2ncj5hfn9flsssop4etdm/xugadisav.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/tetoxirorujoridisuj.pdfIn PDF document text
    • http://faptvmedia.com/userfiles/file/53510876795.pdfIn PDF document text
    • https://4of100churchstreet.com/assets/media/files/labawaremareluzufivatoxi.pdfIn PDF document text
    • http://digitalqwerty.com/ckfinder/userfiles/files/fawupopovetiguwo.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/bapiriponuge.pdfIn PDF document text
    • https://aalatour.com/basefile/b2caalatourcom/files/16040083837.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16130bba3044f7---xefozenanumebuxe.pdfIn PDF document text
    • http://vaynhe.com/upload/files/28412903253.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/42504202982.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/wukogufenosefofomukixuzan.pdfIn PDF document text
    • https://eniedu.com/data/file/20210909193735.pdfIn PDF document text
    • http://barrospizzadb.com/uploads/files/96684216604.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/bigatap.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/66227278990.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/ritobuzovokiror.pdfIn PDF document text
    • https://avflash.nl/upload/files/6614876846.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/50509991358.pdfIn PDF document text
    • http://xsjsbzrw.com/uploads/files/zojonakajonezabire.pdfIn PDF document text
    • http://ingore.cn/upload/files/10345199126.pdfIn PDF document text
    • http://realfootball.gr/userfiles/file/19790744564.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=black+panthers+streaming+vfPDF 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_off0000e9ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CC 20884 bytes
SHA-256: bd56ea739bfc4e83222f481dd179ba5e1ea50e4fe8866c37826aad7481681d83
font_02_sfnt_off00013809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13809 11016 bytes
SHA-256: 5bd5a8d11d72e77ccbf6290ce6addc3e216fc6f25d6b049c818dbdff3b847cd4

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