Malicious PDF — malware analysis report

Static analysis result for SHA-256 df54717b612452a9…

MALICIOUS

PDF

92.9 KB Created: 2021-09-05 13:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 19954c5324afea9a9fbdf9ffa6750a09 SHA-1: 2d5d0a206a8c3a87a8cbf4fa7593f6bfeca5522f SHA-256: df54717b612452a962b610d4913da712183541d739b79b9cf9945c9aa3d87acf
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate it functions as a link farm, likely to phish for credentials or lead users to further malicious content. ClamAV detection and ML classification strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/77100e9eb4d3e8367f231bd900c2712e/93458104960.pdf In PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609900f64f866---31072913150.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/bopakorafasa.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/fidas.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ce23f4ec048---57300944842.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b4bb0c031b93cf65b47c2d2f4ce3f585/ranomofov.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/21390240249.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7c0906ebe---57767691862.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/687a310302cf0ac24741b285f36b1025/bolevagevowapuzidejivava.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/86078720460.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/254qt1sk4c7034idvjs5pgc2jr/reteludat.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/megidexe.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/6bd43d0cf933c95baa9fc00f97475354/potisapi.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/tisiwikorufesi.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/nolebovixejamejawuwufig.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/aae4607d62f352ef6e1e0fa27a16ca11/woxivirinejeju.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f6ac1acbe2---jagivudipogoruvabile.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/ef4c6d1456534ce2b378b5c0eba6999f/sitez.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834971de75d---29560034759.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/86435515071.pdfIn PDF document text
    • http://fundacionecla.org/resources/original/file/47839082225.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/91bd0b3dfda5f38640fa4399eede84d1/5916290267.pdfIn PDF document text
    • https://alohasafaris.com/files/31377642791.pdfIn PDF document text
    • http://innotack.com/userfiles/files/66300424431.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=evolis+primacy+simplex+pdfPDF 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_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 19256 bytes
SHA-256: b951ea8592d0dff224b1e1898d8fc80260cbbd71356cc72e045bf9d9d218e5a3
font_01_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CCF 10844 bytes
SHA-256: 9a6e442e2ef4641b9e3af255b839782e728dfd693efcb21c168f020b1e1796f3