Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b99f01648a5da7…

MALICIOUS

PDF

94.6 KB Created: 2021-09-07 18:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f39f70fb1a06139d8dbc9444eb181072 SHA-1: 915adb652794999596daf3e1cbfccfae016b3222 SHA-256: 60b99f01648a5da7121c090e1c5994eb32775d25df2be1a8794f6b4d5cb07653
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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
  • 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://bettaletroom.com/file_media/file_image/file/74327722907.pdf In PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/qsb9f0fikgkn83u9jf912u0ti3/bufiwilalarotoj.pdfIn PDF document text
    • https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/2d408fc80f057c91892a8d0ceb60c7f0/45441865320.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6a9c2920bb---36491456874.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/48952641151.pdfIn PDF document text
    • http://airholic.com/UpFiles/WebEditorFiles/file/12837470175.pdfIn PDF document text
    • http://hourinkan.net/js/upload/files/waguzijuf.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202108241341404408.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/naloxuvijugelobelufiwisu.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/ks6ueu7m6e45o44lcnj5h68lor/litor.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/1cb3b7b0efa398e22da963af8a192df3/visekakuwoxizigu.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/62678931924.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a03863ce182---29930264978.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/51813675174.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/rigewapokegolizuzoram.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16075afa8b2f28---levarufonugodomav.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/61607250858.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/1c3bfcd22d70f468e277014104cdfa8e/wawimopaturelarazeg.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/37582441767.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-8-9/20210809103001659853.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d3d6767b76---mexofig.pdfIn PDF document text
    • http://saktigroup.in/uploads/vipogogexi.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/35661966585.pdfIn PDF document text
    • http://mtlebanon62.com/clients/5/5e/5ee551a8be14a26d7d76bc5e90dd1372/File/dukifudovepekuratabep.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/jatagiwoni.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/motepilijipibeberajuruzab.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e9f238c57---11017035636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=software+testing+automation+framework+pdfPDF 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_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 11148 bytes
SHA-256: da90824f0dbd3e9af918c417f99ed84d385d981ef3aea26fc8f781a9aa968f6b
font_01_sfnt_off00012362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12362 18488 bytes
SHA-256: f0cb5a8daa8351b956c595b69fcdd002c7b7739a5749f854db9ceb98e33a0303
font_02_sfnt_off000153fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1