Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a5c747f26130b53…

MALICIOUS

PDF

81.6 KB Created: 2021-09-01 23:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd73f2f29ce7b8b5cdfcb6108df8b4e9 SHA-1: 48afc73073afee9e11fd2c52a46cd3e8300b77ed SHA-256: 9a5c747f26130b53a497c56db4a8e7f5a836d5916ccc1f9edb5fcd7616a069d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics indicate the PDF contains a link farm pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of numerous external URLs points to the file's role in directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://travisreunion.com/clients/1/1d/1d9c560ef9ee6310b862f4c9d288d7bd/File/tumasadezogizoderolag.pdf
    • https://guapa2.com/admin/fck/file/73446401842.pdf
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/da7aac7269e88ee3f0d314195311f405/44417871557.pdf
    • https://www.letspassdriving.co.uk/wp-content/plugins/super-forms/uploads/php/files/vikb7bhmfbnta1emfqf7j6rib7/fiduvox.pdf
    • http://khacvietlaser.vn/public/images_news/files/sudetamuvajib.pdf
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606df9c2918f7---fokegupopuda.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610a02cb559ee---28259062372.pdf
    • http://flygarfield.net/userfiles/file/41273427016.pdf
    • http://ecovn.vn/uploads/news_file/vojofunetamibirasoxeruvo.pdf
    • http://self119.net/upload/userfiles/2021/05/files/210530010810.pdf
    • https://shopexpert.com/app/webroot/files/userfiles/files/morilebuwubimupoguzo.pdf
    • http://fixafilm.se/userfiles/file/tojol.pdf
    • http://www.urbanwaterways.info/files/20517007374.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dafab847a68---juketofonerojelamogetir.pdf
    • https://tselectromechanical.com/uploads/CKfiles/files/70786660863.pdf
    • http://calhi1977.com/clients/879053/File/50142427497.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/b00bd852e5f61cad2a564d7099909cc2/topojitunikimomodopixu.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b41c6c3f96c235bcb8610e018b14f2fe/gixike.pdf
    • https://numberonerevolution.it/file/3065352743.pdf
    • https://smobiil.eu/userfiles/files/zuwazozogufewopikafa.pdf
    • http://curry-box-deluxe.de/userfiles/file/fitixoli.pdf
    • http://tchid.net/userfiles/file/80406336542.pdf
    • https://mimpidia.com/contents/files/nitumiketedorul.pdf
    • http://seabeachthailand.com/UserFiles/file/83026074805.pdf
    • http://a-kamen.com/userfiles/file/33561569274.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=romeo+and+juliet+standard+tuning
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc79.bin
f44479cf1d8a186e49fc90929f518556f677ffd8efbbfcbf046f7d185780ac82
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC79 16776 bytes
font_01_sfnt_off000107af.bin
164c5ec291a21082215b0e5320742c9a2487bde958bc2e22bdecffaab9e06fc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x107AF 10864 bytes
font_02_sfnt_off0001207c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207C 16792 bytes