Malicious PDF — malware analysis report

Static analysis result for SHA-256 47515a18d8de9c09…

MALICIOUS

PDF

85.8 KB Created: 2021-09-17 04:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c931943f969f9d4a457b67048cd58a3c SHA-1: f8fdc00d63650e3da26ad16d67505634690d592a SHA-256: 47515a18d8de9c0943fe82a9f10fc544209a4baf8e9aaba0d76bc9fa2c4645b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a large number of external URIs, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The primary purpose appears to be redirecting users to potentially malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=jobs+in+android+app+development PDF link annotation
    • https://ipekyolumedya.com/resim_galeri/file/84038117973.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/b3dfdbf7592cdcba6850f4fa879d1b69/gimorivufetu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/folesuxafiwakazipetu.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/tusome.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/lafozunibiregatikiliz.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/81654627238.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/vuborataziraniweroz.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021091406262053.pdfIn PDF document text
    • https://renebeumer.nl/userfiles/file/41283101476.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/48054834882.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/likexagilopil.pdfIn PDF document text
    • http://www.eurosecurimed.com/ckfinder/userfiles/files/padobatazasizupo.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/96503411668.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161404c0b02ec4---81710792602.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/getatodiwazojejeda.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613246186066f---mekopafomuveg.pdfIn PDF document text
    • https://gbp.dropship-online.com/userfiles/files/megeripafewita.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/kalovamojolejaxubib.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/34699555059.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/san475ksd7dsmtf1kerk4md5lp/33183904277.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/40118004539.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vuderobabigoxusak.pdfIn PDF document text
    • https://interstudy.net/userfiles/file/13294300788.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/29935085081.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_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001011e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011E 18708 bytes
SHA-256: e6bafbf1fcd5529d5fb1e8b65a5453d42b93f81bf7238bd3b55b73beaec9875a
font_02_sfnt_off00013188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13188 10748 bytes
SHA-256: 3646ce153dc46cf75a19c9079ee87c8e3f9aa335c820b2f2b9468fb35d8b61e7

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