Malicious PDF — malware analysis report

Static analysis result for SHA-256 9848e6cb9d2d755e…

MALICIOUS

PDF

264.5 KB Created: 2021-06-28 16:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 0ec9c53e0f58aa82e3e96ba0fd5eb776 SHA-1: cd7997dd4c312be4b2f0cd3629f7447df2eaced6 SHA-256: 9848e6cb9d2d755e44265087486dd26b728f7c04ad3a682f4ac35ea4f09bef22
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of embedded JavaScript suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9805

Heuristics 6

  • 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.
  • 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://ideas4mypool.com/userfiles/file/loxesufiximidelanokebajow.pdf In PDF document text
    • http://buergerforum-tirol.at/file/matikafu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1bed957bc---26377345307.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762856d76d8---53145850824.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/cu880otcg9jnlq2u5t2d8npv1r/nigewebidorosolowoxesof.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/jujofotalo.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/62f5aae69f22882d7f927fed4ae8173d/96340389617.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff0f9030a7---nevisurugog.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160792b4913138---gumewe.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/valewipozamege.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd69b34fc9---vimusiwuzore.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/mekebogadezamozokeveseteg.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160835b4386d82---82367430028.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e5ea940b8---81363998886.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071c8ff1abaa---39555003700.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608952d29d9d2---tojowujevaloxupafasujax.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/93508523767.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d034e261---81168473123.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cee20cf577---68370815016.pdfIn PDF document text
    • https://www.saammohaseb.ir/wp-content/plugins/super-forms/uploads/php/files/b7c995ac8b517e12dc984803426bec7f/madijez.pdfIn PDF document text
    • http://mmckno2010.zkosuchdol.info/files/49154020202.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094df314d362---93190445172.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/xidosolofutovogojidegur.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608127074d29a---38113871854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=triangle+with+an+exclamation+markPDF 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_off0003b763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B763 10752 bytes
SHA-256: e79cc8f412cf2797860cf7e0312a5617568a8d7a304382d9c39ca5175e499bfc
font_01_sfnt_off0003cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CFFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003e80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E80F 16596 bytes
SHA-256: 13bb92950c370a678af759e6893808385211bc472a474242a4a51c76ccee5dc6

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