Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cb7ba89107b9ddf…

MALICIOUS

PDF

76.5 KB Created: 2021-09-02 01:33:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f4ae667832335df83a55c7216b70daae SHA-1: 8c6d32228e70be1103dda0a1cb9aaab7980d6d68 SHA-256: 6cb7ba89107b9ddf48535b6017243efe846039e1d4aa0d01265a58a7504f79ac
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external links, many of which point to compromised WordPress sites, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd1ef1d86b---27039850275.pdf In PDF document text
    • http://chiangmaicharmingtravel.com/ckfinder/userfiles/files/dedunabazex.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/25508931774.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/17039176107.pdfIn PDF document text
    • http://globalcenterhotels.com/bot/ckfinder/uf/files/tetuvevabukelo.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e7c554d0f---nowevixolaxoxa.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16086925cdb75a---91617704174.pdfIn PDF document text
    • https://www.travelknowhowscotland.co.uk/assets/js/ckfinder/userfiles/files/banadixeragomonel.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6dbec9bfdf---55574774824.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/fccb3e2b33db25282342cee997f3a968/nutomanebasidofebebis.pdfIn PDF document text
    • http://makingthegradetexas.com/clients/d/d4/d4716c73f098ea79da165a2194b6736a/File/15161620282.pdfIn PDF document text
    • http://hibertek.com/image/files/20210619_104201.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/jabunudexisejilomivaj.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c37476def---lomasezeturagi.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/51947801680.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210830090056.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/sipurelavajotit.pdfIn PDF document text
    • http://vietcem.vn/public/default/ckeditor/files/dijejapadijeruzididul.pdfIn PDF document text
    • http://halmar.info/userfiles/file/20073384130.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/pipumulotun.pdfIn PDF document text
    • https://hopclickhospitality.com/scgtest/team-explore/uploads/files/61117688250.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/27322146831.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fire+emblem+the+sacred+stones+gba+downloadPDF 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_off0000c4c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDB 17448 bytes
SHA-256: 8922bcb1d9d8638b344361f5cb961b5a85f2f91cc4de9699d3d787017cc08840
font_02_sfnt_off00010a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A50 11020 bytes
SHA-256: 0410ba9866668682db9d567faaa466a78f3384f6882adce730a201baaef034f6

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