Malicious PDF — malware analysis report

Static analysis result for SHA-256 419dd1691669e6fd…

MALICIOUS

PDF

76.4 KB Created: 2021-08-27 22:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ebeba4ea14035a042844df8ee965dd81 SHA-1: 807d61c1a62c4a66eccc3aa9fb1e643c69cd8092 SHA-256: 419dd1691669e6fd2f1d107d4a4909b47e5471c2d25d9053a0a0bc0986332022
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The primary goal appears to be directing users to external URLs for potential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=radiology+offices+near+me
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7e4843a42---ravesokukuvisu.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b824c1296---gifawigerexadoxalinesep.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/94849384672.pdf
    • https://mercerapparelss.com/userfiles/files/savej.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/ctmadj9oanskub3jtcoqflpec6/87491058927.pdf
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607caeb97fc0d---38993863162.pdf
    • http://architettosirocco.it/userfiles/files/32487094055.pdf
    • http://888chji.com/userfiles/files/40590297248.pdf
    • http://carnow.jp/js/upload/files/jogifalafisewos.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/d4gt8r26d290ajid8fqektnf6e/dalomov.pdf
    • http://clarksville.net/wysiwygfiles/file/tokaxebasovuja.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/7149121876.pdf
    • http://scbczy.cn/up_files/file/20210808_061921.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/h893ouu71kvfnentonc992g26h/56275996632.pdf
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/32b3f014058b6810624cd7f2a910016b/57934169494.pdf
    • https://papersacksfactory.ae/images/bulk_images/files/mixunututimitugeko.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e0e745eac---laxilubidilazuwajof.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcb11603a3---zolepewiwodeka.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/39b8b7b7bed50a86d7becc872523cd55/92238118033.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608630763c58c---gomalugixobixanazaso.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/7eab3a40b27589fea9d2d7e5d20a0f2d/razuvet.pdf
    • http://sjar-tech.com/uploadfile/file///2021082504454473.pdf
    • http://zonweringnederland.com/ckfinder/userfiles/files/81903916836.pdf
    • http://zatacorp.com/upload/files/97445703.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e08416354699b9bfc64c19fb81548646/fofoguxegelarasusewiw.pdf
    • https://artlabjo.com/userfiles/file/mogapusegemazenaxama.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c776.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC776 16792 bytes
font_01_sfnt_off0000df88.bin
f7a95ad0a811e1a6aefc84b6f2457fdde57e62323fd19cc75248b91cf730b824
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 16544 bytes
font_02_sfnt_off00010a52.bin
d0742d76f4c3a9b8aabfe4c171fa6d6ec1185563a323ed6bbc198d021999acc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A52 10880 bytes