Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7e219472aa3895d…

MALICIOUS

PDF

82.2 KB Created: 2021-08-18 08:55:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d4c32763d736ae0c84f3fa1f613106c SHA-1: 87f6eb333c0c0933cd05989db20abfca0197b390 SHA-256: d7e219472aa3895dc49ce78c2bacfb779de831561a8fd1be1c09ed762fc24376
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The presence of numerous URLs, many pointing to compromised CMS uploads or disposable hosting, indicates a link farm designed to redirect users to potentially malicious content. ClamAV detection and ML classification further support its malicious nature, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://fine-trading-knotwork.com/uploads/media/wakali.pdf In PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/52540880821.pdfIn PDF document text
    • http://nsk-nalogov.net/upload/files/fipedalir.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc3452c328---29016249136.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf87c2bfd7---bedozen.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/048bgvt6c77q25p4ogosqt3p42/fidulozijozuro.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/98863584614.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bf11b618279---fovolibodokupeto.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/wunejinumuguxabino.pdfIn PDF document text
    • http://medwin.kr/userData/board/file/tirobozomukawewakoba.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/komeg.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/vilobi.pdfIn PDF document text
    • https://unosms.us/userfiles/file/gigelev.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/46070181175.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/viwoduzuxopefexog.pdfIn PDF document text
    • http://henri-ruch.ch/doc_pub/file/5638221638.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/aefc13a24705630df73ed8d3f4a96177/rebomeloxetize.pdfIn PDF document text
    • http://wohingltd.com/userfiles/lijido.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/70647768774.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/e8f49e2a8fe00a0f18fd988b2ead7bd8/1383855075.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/7118705bd2b105bf5df6f5302548c82a/56291027267.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/11926815179.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/v42b85u58tm40pgh25nqv94pl8/lirapag.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/rggr4fq2j6tu9qdvbe03iiq0dl/jukewatetubikomala.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cuantas+calorias+tiene+1%2F2+taza+de+avena+cocidaPDF 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_off0000dab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB5 10828 bytes
SHA-256: 5946518072531ecb96a43dd45f2e0f1510df54e5712f452190c71199cab58908
font_01_sfnt_off0000f40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40D 17696 bytes
SHA-256: 730ef77305eab2ab95c42ccf77206e10c6c8621e555e208713987395fb6234a1
font_02_sfnt_off00012118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1