Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa18530d99bad734…

MALICIOUS

PDF

89.7 KB Created: 2021-07-15 12:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d2aaf5d33e038f9cdcf78ddd16f439ac SHA-1: 933be0a4dc6941fff1b5a792882106e5ca98677b SHA-256: fa18530d99bad734709053c6fcb75d1d17284d0b85835e4aaf12290eab3fb1e4
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress uploads and disposable hosting. The ML classifier strongly indicates maliciousness. The embedded JavaScript likely facilitates the redirection or download of further malicious content, while the link farm aims to obscure the ultimate destination and potentially engage in SEO poisoning or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://luisacortesearchitetto.it/userfiles/files/kufamopog.pdf In PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2474c01194ca17a6a99cc919d3921797/3877984265.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cec78a756---44552673482.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/268ae013d22e810b02f0e84a9417b163/70823621335.pdfIn PDF document text
    • http://ergo-logo-bamberg.de/userfiles/file/60099055815.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a65dd7e25---fasez.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/ecbed77de7c6736624fc3ed25f1ed396/lupipaf.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/bebe24e72eb395cc21869b441f2b99d5/95010265669.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/34409551053.pdfPDF link annotation
    • http://betamarin.com/images/media/files/98261937778.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad454c60e4a---59750149820.pdfIn PDF document text
    • http://nghiencuuykhoa.com/uploads/userfiles/file/93642012214.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/ccdc7bce57edc401216dc7a645ae3c20/14643983989.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/51113365308.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/siguguri.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/lepude.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608032b1a2c6d---sijosufifimu.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/gugapogulazavalalekobepiv.pdfIn PDF document text
    • http://tulsamemorialclassof71.com/clients/84987/File/39100012743.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/kosis.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/681009fd61fc9c5348f2e9c7fdf69783/77417364608.pdfIn PDF document text
    • http://newfieldclassof1982.com/clients/6/69/69e49ffade321d977af769e13f9f004b/File/97047482042.pdfIn PDF document text
    • http://palami.by/images/file/zitupilutuke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=little+shop+of+horrorsPDF 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_off0000fd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000115a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115A5 10144 bytes
SHA-256: 49881cb7a2d8133fa822591f26201b998c89feded26ab3d65d5f404ffb2b7d38
font_02_sfnt_off00012c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C6D 17572 bytes
SHA-256: 67173349dd085846eb56a5d7e63e7864a8938d2fef648c6289fc5c87f869e173

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