Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfc96b9f80c6af24…

MALICIOUS

PDF

72.0 KB Created: 2021-09-18 22:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3ab0659a905274cb090b827a2f664bd6 SHA-1: 059286aff9fbf32bcf2608675d05245cf1a7aa73 SHA-256: dfc96b9f80c6af2415c74ddba78787cf4348e7216838d7b16f95e69ecbe84e09
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to T1059.007, and the overall nature of the file suggests it was delivered as a spearphishing attachment (T1566.001).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://pistant.ru/uplcv?utm_term=naruto+shippuden+game+android PDF link annotation
    • http://felixefontesadvogados.com.br/ckfinder/userfiles/files/83904685271.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/dulabosilaxurefuv.pdfIn PDF document text
    • https://egf.tw/test2/images/file/lufilaronusotumodotusa.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/nurodidiguxajuburovinamon.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/26059208263.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/11980926931.pdfIn PDF document text
    • http://www.grifin.sk/files/11117531680.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/61565313444.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613fce986e138---30516346755.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/kexafiduwedex.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/wusexifawobumedimanebu.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/3541577048.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/8063032943.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/lujogabujejezedofi.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/fb7afa20982dc46e9aabcd28e2cebdd5/kofafejumifesej.pdfIn PDF document text
    • https://pellevah.com/upload/files/todot.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/gurepamozetowukosi.pdfIn PDF document text
    • http://hkwwta.org/userfiles/sataziro.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/sosejekenene.pdfIn PDF document text
    • http://congluc.com/upload/files/6122985110.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/70868412786.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/kalakobokijur.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/59379799649.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/60234175395.pdfIn PDF document text
    • https://citytrafik.nu/images/file/lamep.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_off0000b61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB61E 10868 bytes
SHA-256: ed0e61cae59dccb83b85aafc526d24a7303ac21ab6bb6c3ede5f4b5c8b27704f
font_01_sfnt_off0000ceda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDA 16828 bytes
SHA-256: e430f332070296d884b60fee09bd2bb8111e40983c670c4809fb1e1db1410022
font_02_sfnt_off0000fa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1