Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0757f63bf3ad0d…

MALICIOUS

PDF

69.0 KB Created: 2021-09-19 03:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 974e76778504773871772abee4e396cb SHA-1: bba4bdd0f1c6b3f45d0f2d4c17af3849695849bf SHA-256: ee0757f63bf3ad0daf7adf60269a40b1da2f41fdd364122054e4cdcdf3743f7b
104 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple URLs pointing to external PDF files, suggesting a redirection mechanism. The presence of embedded JavaScript and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to redirect users to other malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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 https://foodexgida.com/uploads/files/zelujepamogixasiveme.pdf In PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/6394678555.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/bakotegemawalibus.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/gopunikatafuwikalatoweme.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/70740278306.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136ac4f54270---jetudizazin.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/51774888249.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c73d2d44f5---56340498408.pdfIn PDF document text
    • http://dealershop.es/camarasegovia/userfiles/file/fuwoxejifuko.pdfIn PDF document text
    • https://pamukoglu.com/userfiles/file/33930108579.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/sakejuvavozogisuk.pdfIn PDF document text
    • https://thietkeweblongan.com/upload/files/daxurapipumevuge.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/27737654806.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/gowesonopaxegobalik.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/84053740028.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/nekidisijamok.pdfIn PDF document text
    • http://www.videocopilot.net/assets/public/ckfinder/userfiles/files/xalatomanatawufi.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16141dd118f7a8---36356271230.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/kufepofenisewesajixifigob.pdfIn PDF document text
    • https://terracell.pt/images/file/bevipitidafozuw.pdfIn PDF document text
    • http://stmarysharipad.com/userfiles/file/25712921946.pdfIn PDF document text
    • http://brukikostka.pl/uploads/page/file/7056331711.pdfIn PDF document text
    • http://sunwisechem.com/Uploadfiles/files/80406314314.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/t96i52fqde48v7khla7vod684j/12577262393.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/tazifut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=freeflix+download+for+androidPDF 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_off0000b3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3EB 14280 bytes
SHA-256: a742343254eefadeaedb743c1944a4fe03a0406da9ee0daa625f9bb024c4f131
font_01_sfnt_off0000d72b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10248 bytes
SHA-256: 1e8ac947a18405c66f908c491eff2cff5ea2fb49b9caf59aef73d036e357dee6

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