Malicious PDF — malware analysis report

Static analysis result for SHA-256 7009008de67c5efb…

MALICIOUS

PDF

79.7 KB Created: 2021-09-12 18:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 545733e4c7b8ecc0a77d8eb93eaf5195 SHA-1: 12bf8f54c691795dd82fd44e2d399da5843ae0e0 SHA-256: 7009008de67c5efbbcaeee1b260d757e93e768876ec7f8a8e62fc35221f2a45d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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.
  • 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://dampinggame.com/calisma2/files/uploads/tinudipopatifiwaju.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f8152505c---tozizokexidofumufajakebo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/damamenidenenafajem.pdfIn PDF document text
    • http://senvietsystem.com/ckeditor/upload/files/fobitosebuxojuzuwojes.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317667302c1---86299492323.pdfIn PDF document text
    • https://saglamahsapkutu.com/img/editor/image/file/vizexorudukuw.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/gigifefakiwofupe.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/tagitidevowizujik.pdfIn PDF document text
    • http://geose.ru/userfiles/file/31409115623.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202109021217589149.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/12146d8d22f2675f3b172f4bb717457f/kabozamazole.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/30525127890.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/27c21ffc22ad85a8b33d9a9e6129036d/25925233056.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/lesawigoselijapibepafala.pdfIn PDF document text
    • https://jck.ro/userfiles/file/99026071362.pdfIn PDF document text
    • https://jin-ji.com/upload/files/fixududaditufijaki.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/38526270583.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/fuganakenasuvarupi.pdfIn PDF document text
    • http://marcelponjee.nl/ponjeefiles/file/nozaketo.pdfIn PDF document text
    • http://progetec.org/userfiles/files/73211259850.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/mexeruxidozezagiwi.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/papilatoli.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d3adb4ac23---dinimatewikij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=dungeon+hunter+hd+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_off0000d5e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E8 17020 bytes
SHA-256: 7a77cf73d1473316049449a309099ca422c1cbabfa437c2845ac1b82ed66b7d3
font_01_sfnt_off000101fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A14 10556 bytes
SHA-256: 2989a58b4111c7875c2e277aace7e8d66b0a47e1d947c1a0524f151f9bd0470c

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