Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6824e32c7102edf…

MALICIOUS

PDF

88.9 KB Created: 2021-09-18 20:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e4db73cfced5b4b97d81d35d685a934e SHA-1: 299afbdbe6c1b90365ed0cec8d593dd682554241 SHA-256: d6824e32c7102edfbc651ed313c368985cb640e1afffbcbd6be9d6e2a19b16b0
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a fake browser update or extension. The embedded JavaScript likely facilitates the download and execution of a second-stage payload, aligning with the observed phishing and malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://crysiq.ru/uplcv?utm_term=android+store+chromebook PDF link annotation
    • http://studioindelicato.com/userfiles/files/26031539884.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613c98ede36b7---ziveb.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109020102046935.pdfIn PDF document text
    • https://fundacjanadzieja.com/images/wyswig_images/file/zuwotiz.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/76616169021.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/82289034406.pdfIn PDF document text
    • http://cafehinglung.com/uploads/files/vusumodewejugivi.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/defoj.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/11595183137.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136b431c4fb6---1313439528.pdfIn PDF document text
    • http://www.bash.cl/media/file/24865350620.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210912_13383A528308F969.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/jujalosolejudom.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/ladevijotofuwilaxu.pdfIn PDF document text
    • http://uni-soar.com/userfiles/file/87262332079.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/161417219272a1---48066450220.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/jkbirghbujhunpjlt36580vu87/fapelidedu.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/mapegapisifozukewomobef.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/kegoterupebelax.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/89955059485.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/finapidamilazinebuw.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/negelejitedos.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/0ad6eff5f961d7886b1f7b99f6ad756d/pugiwoxolarumapanejel.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/neropuxapaxubune.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/pasovudakenotosasofo.pdfIn PDF document text
    • 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_off0000f719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF719 17956 bytes
SHA-256: 54d71a465aca2135aacf802228763a41013ccffd47ad77818fe5ce964c9901c2
font_01_sfnt_off000125aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC1 10640 bytes
SHA-256: 815d109524a955d16d1d2dea0e78bd486a92b3dc31cd62c400d856748ddb1519

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