Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48e24b90c69e716…

MALICIOUS

PDF

75.4 KB Created: 2021-09-03 07:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 78213526f2039276ee0173a23798b13c SHA-1: 5a936cd60af8d76fcac312d4d5cb89f52aed4d73 SHA-256: b48e24b90c69e716f99a9b56cc0366f688fed08cb8f77e2da6a0e4f5bdba3aed
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to host phishing pages or distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://dyneco.kr/userData/board/file/noxemun.pdf In PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/161244f4c15e50---91038300183.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd62dea6aec---51870784101.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/50830983302.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/zutizasowowex.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/zudilimowuvomopibevapuw.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/7677956359.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/32772816482.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/polotav.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16104143511573---zinewazivagonigunakase.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/ralijewirux.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c0e9e7f5---lupup.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/b7669f92331a918cf5d676a59a1720c8/602531783.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b385125b591---fowodeliwufap.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c66bade0ae4---nolekivi.pdfIn PDF document text
    • http://splogservice.ru/content/file/8880929373.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/18795517738.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae43f816be8---xibozorogizujiwusog.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/68457924234.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/g4n4g92nq6hd0edc91qhn9qih5/vofevozerijef.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/tolumu.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/navonalitobudidokinono.pdfIn PDF document text
    • http://bekkercoon.ru/ckfinder/userfiles/files/lozumukovuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=cutting+practice+worksheets+shapesPDF 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_off0000c2dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2DD 16676 bytes
SHA-256: 9b6ed2ac3d25ceed7b2526c98605d249dee701de50e9d3516a8e29bb1555413f
font_01_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 10916 bytes
SHA-256: f37b853a2f5525102b5bc2d8bac0a375c5f67e052567acd700b30a0b6f2620c9
font_02_sfnt_off00010773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10773 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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