Malicious PDF — malware analysis report

Static analysis result for SHA-256 9664091ea5d6bd21…

MALICIOUS

PDF

71.6 KB Created: 2021-09-24 16:08:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: da86877c828fbcc4f40d74dbd1bfa2cf SHA-1: 7031c1bc11ea5e9050572b51f72294bdad41cad9 SHA-256: 9664091ea5d6bd21a44c4a3675b0133ebd7406b9a9c2c72c2a91fd40241e1645
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection, indicating malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document's purpose is to trick the user into installing a fake browser extension or update. While no scripts were directly extracted, the presence of numerous embedded URLs, many hosted on compromised or disposable domains, points to a phishing or malware distribution scheme. The document likely serves as a lure to initiate a download or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • 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://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16142f0c668ff3---95458119645.pdf In PDF document text
    • https://aletihad-group.com/userfiles/files/remoded.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/zupojatipaje.pdfIn PDF document text
    • https://kochitaxirental.com/ckfinder/userfiles/files/talapotevaxenowawepapa.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/wexupikawowiluw.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/3b966b455f795ea62a537b5a08ff3aba/zoxowelibezukewepikemogu.pdfIn PDF document text
    • http://kelakewangshangduchang.a9188.com/upload_files/art_files/files/20210913_183057.pdfIn PDF document text
    • http://designbyjoseph.com/uploads/File/talumez.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/74677682923.pdfIn PDF document text
    • http://reylab.com/userfiles/file/tikav.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/gulavikutut.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/33453714665.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/8332916176578959f4b60197bfc392d0/pasanatojurewuwufalivosun.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/lulotiw.pdfIn PDF document text
    • http://skulpt.in/admin/uploads/file/45277280794.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe53774c9c---lupijirekisugise.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/67545597289.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/34529945470.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/jaxiriso.pdfIn PDF document text
    • http://gardenofsound.com/userfiles/files/41944867720.pdfIn PDF document text
    • http://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nebikuzawutukigis.pdfIn PDF document text
    • http://juha.be/_files/file/sobupisekosolukaxuf.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/nufagusosamitupakefeni.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/lipusisomuxibelawiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=app+to+sd+card+apkPDF 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_off0000b419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB419 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2B 17788 bytes
SHA-256: cf47d743b6914c8527b7ef755e703ee60392b99b2a67b773330e37a5e6a62f34
font_02_sfnt_off0000fa16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA16 10208 bytes
SHA-256: 5a3c0479a2a7f7e8afd5f0a3d29661925e1f4ad00a3ff2a36ba8d32165907d6a

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