Malicious PDF — malware analysis report

Static analysis result for SHA-256 3570208f1cfb93d5…

MALICIOUS

PDF

89.6 KB Created: 2021-08-16 23:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 28831291f715dcda9dfd597655bb082c SHA-1: dc8937f707b1a94e67938938043e941f89053433 SHA-256: 3570208f1cfb93d5b0a15104e28ea8e8cc2388e8ea2902fd6e887d74da42d7ff
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute malicious content or engage in SEO poisoning. The presence of numerous external URIs and the 'link farm' heuristic strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 6

  • 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
  • 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://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a26c22e20c0---jodidepazavorunu.pdf In PDF document text
    • http://uk-finansist.ru/userfiles/file/69280923634.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/3921122cde935c4d824380456eebafec/tugewuzuxemojaru.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/sunalifiwifuti.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/tujufobewawumiwot.pdfIn PDF document text
    • http://vdtonline.vn/static/uploads/editor/files/84034447932.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/mowaxolawam.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202108150826336400.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/79867765010.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/4858ognj98ciehs9p1klk8d631/56960637855.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/bakivorigajez.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/zuzusolavovaxedavotefufod.pdfIn PDF document text
    • http://charivne.info/images/file/29045825657.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/3rb0kf01aaoh05lvlkmq62scr0/bipejotixosutili.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/sujebenisibafuxaga.pdfIn PDF document text
    • https://fallsplat.se/file/52610654307.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/fib5in9d98r2phk02olfiakpc1/81201975286.pdfIn PDF document text
    • http://elesi.eu/fichiers/files/dumupozukivotifovotus.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982f37ccefb---61600731664.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/72577311182.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/65d1fd00d116ac1dcd77ce33964b9a66/99711751119.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160be1bde6dd9f---suxezededeto.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/sixex.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/setulizixani.pdfIn PDF document text
    • http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/wepesejovizaguz.pdfIn PDF document text
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe96fc7cd0---fevex.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/jigulanuzowivufiroxutan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=les+nombres+d%C3%A9cimaux+cm1+exercices+%C3%A0+imprimerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF35 11220 bytes
SHA-256: 81bfb57e437ddfbc55f7d5833c3cd8a3dc4757d9de39f6fb1ad1f4ef98836342
font_01_sfnt_off0000f896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF896 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A7 16136 bytes
SHA-256: bc71e3ed91607075f36e1f1dbb8869ac5f52413a21a56a839221c2358f77d202
font_03_sfnt_off00012615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12615 18320 bytes
SHA-256: bdec130aaee56e06d455134e389817b839e10f648a3def0acbcb58c114f80605

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