Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccf72ffde322945…

MALICIOUS

PDF

72.1 KB Created: 2021-09-07 16:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e498c36d3b569aaf7f218e563a8c0cd3 SHA-1: 59c3bd3eb9565865e52261e836dba24865d6a2cd SHA-256: 0ccf72ffde32294582ba20be2aa562fd0b8e80845daf4a4a048c204d26af219d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristic firings indicate an attempt to exploit users through deceptive links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/hc474uvms33vvc3c81bta7hg2b/xulos.pdf In PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/depolijulojafotewowerida.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160982bafaf180---345495363.pdfIn PDF document text
    • http://webatnet.de/ckfinder/userfiles/files/38138985458.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d328fdc0b54920b6659e6b55663bd4df/35243243615.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612de7454e89e---44585199708.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/67921268141.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/26159449784.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f906642877b022bd131668489984a945/kakobegaxarenebavexo.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/ec959f50f6991807168be29dbadd8494/34449905960.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/viwut.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e054e487eec1e57d381b5b4061739613/71388686122.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/44552504100.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/99278916447.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/musezugipezulejar.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/pefeze.pdfIn PDF document text
    • https://bamor.org/userfiles/file/96025706138.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/buxewasaxugenonimarunem.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084952918f18---gerekepiv.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///86295443175.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/tepugigunesetu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=riggio+industrial+organizational+psychology+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_off0000b8c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C1 15820 bytes
SHA-256: 3b5ff923a9e473f46c3b10f0c5862a1e0a92baaa0e4280797199ac43bb9a9db4
font_01_sfnt_off0000e0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FE 11088 bytes
SHA-256: b19b4564a4ab72057e6e582c78d19fee24bb9e4c264f7baf8ef62d08e592d34f
font_02_sfnt_off0000faa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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