Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5d0d020e76288f…

MALICIOUS

PDF

70.9 KB Created: 2021-09-29 11:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 05015aff17f2ba068777e7163d0b5715 SHA-1: 9adaad0917ecfa7b05c78dd6c54aadf1404173ec SHA-256: ee5d0d020e76288f9e7b38dc557dbae2b86bd79ce4235c1219bec50f3ade6e5c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable hosting, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://uzsienis.cvzona.lt/resources/img/files/81881975923.pdf In PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/161372f54acbba---19875808480.pdfIn PDF document text
    • http://pactolous.hu/upload/file/najodokorufasej.pdfIn PDF document text
    • http://fruhmann-elektrotechnik.at/wosuzixukusetotojafa.pdfIn PDF document text
    • https://generalaudit.pl/eurostyl/photos/file/jomidobozokuvedekovefodu.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021090523001660.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e63a06aceb---dililiriditupojotisenase.pdfIn PDF document text
    • http://planetamama.ru/files/file/wabot.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/ee52b60eab7a6f3d338c613c3d1c01a1/75747490849.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/9f12db6ab948898b498aa89c16fb1612/32987948589.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/93030825484.pdfIn PDF document text
    • https://suncables.co/images/file/3968911021.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/1733507060.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/23602589922.pdfIn PDF document text
    • https://lifo-sea.com/ckfinder/userfiles/files/komirasagigikazulusulebo.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/17355112554.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/gusigo.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/lisulumatedubamig.pdfIn PDF document text
    • https://ka-base.no/images_content/file/zejifawotofij.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/86204982822.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/xojojuxal.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/zekiguvok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=national+dog+show+shih+tzuPDF 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_off0000afac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAC 18152 bytes
SHA-256: 4048f930518e493f790b534befc3c0cf69c38cc1650487615922a302c0392d0f
font_01_sfnt_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF687 10520 bytes
SHA-256: 019c654f46e9b5c68cc5a9ecd7fb845468c20d8688655b3cd1d4d760a565b959

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