Malicious PDF — malware analysis report

Static analysis result for SHA-256 d206898f379dfdda…

MALICIOUS

PDF

80.5 KB Created: 2021-09-15 18:59:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 52cffcae966d0adfb1fc3ba42bfc84fb SHA-1: ed61d86d07e94f6e45d3fa52dcc9f2288a6c7106 SHA-256: d206898f379dfdda75ee36638f268f6fc67e33c0f4586513512bcdefd478971a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a pattern of using disposable hosting and compromised sites to host malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://crysiq.ru/uplcv?utm_term=iphone+data+to+android PDF link annotation
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bec794272---lelojimosanenazopibuw.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/21730620847.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/87049518496.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/putoja.pdfIn PDF document text
    • http://lednotice.com/userData/board/file/36483868878.pdfIn PDF document text
    • http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/dekamuropasamawujo.pdfIn PDF document text
    • http://centronegozi.com/public/78378258506.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613deef025081---65837638883.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccbf26db9a---8960490053.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/f30fd2309f6b7c3b1c7a30f3b73f4314/tefuxonirodud.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131829294f68---vomipesedupetulukidej.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/polaxoxamuvunileraburewe.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/paxavapakinov.pdfIn PDF document text
    • http://rezidencianestor.sk/app/webroot/files/ckeditor/files/sanom.pdfIn PDF document text
    • https://landbar.com/app/webroot/js/ckfinder/core/connector/upload/files/tuwewutatud.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/9662199736.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/402df7bac4023bb45716ce24dcf015ce/vusatoxivajuwuko.pdfIn PDF document text
    • http://thuonghieutoancau.vn/uploads/files/megubexifiwarobezuw.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/29561760091.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/movoxanidesu.pdfIn PDF document text
    • http://tai-group.com/upload/files/wilovitipe.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161353544449e7---xebetefabodepofili.pdfIn PDF document text
    • http://langmypham.com/luutru/files/kofubadituzujovip.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/28806951348.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/93a9ad5fb825bc58232f1d3051be364d/89748100293.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_off0000d562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD562 18640 bytes
SHA-256: 082a6ee41f57be043a88891beb378f71948d2a2f261c03735612ef9fc5cdc79a
font_01_sfnt_off000105cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DE3 10224 bytes
SHA-256: 5e7932a30a3529d0b5274a4725afb6a81b0efbcdbd6f08831d7c8e9d61892381

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