Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4faee950d0cefe…

MALICIOUS

PDF

77.6 KB Created: 2021-10-06 10:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-07
MD5: 92f31c19c51a0769302673bd9dacad44 SHA-1: c616c9eeaad38e941cd98769e63687fe171c8333 SHA-256: 6e4faee950d0cefe8c99778cc827ffe8325e966568dd0e58ad16ba7cba01ed57
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution through these links. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • 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.
  • 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://wastran.ru/uplcv?utm_term=jee+mains+weightage+of+chapters+pdf PDF link annotation
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161591aa9403a0---kuxavesemazew.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/jutikoxugenesabi.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/84146770943.pdfIn PDF document text
    • http://studiolegalezullo.eu/userfiles/files/15374336317.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/36292945284.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/nopugemosalomugafikuvutul.pdfIn PDF document text
    • http://teakdeck.pl/files/file/61520239843.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/1d930e5c89451567be672e1763219b56/11400515751.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/wakenakuzilabozogolo.pdfIn PDF document text
    • http://resortcrimea.com/ckfinder/userfiles/files/17821896764.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f0dff4219ff379b874c4120246cc7ccb/pipidifepozi.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/lovifomupakenot.pdfIn PDF document text
    • http://addon-colsman.somantec.net/ckfinder/userfiles/files/molukutakujolarage.pdfIn PDF document text
    • http://klinok-saintp.ru/files/17431878651.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/89846839364.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/lupivorenaki.pdfIn PDF document text
    • https://mundolibre.cl/uploads/userfiles/files/tatuw.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a2e8215aca---8736767375.pdfIn PDF document text
    • http://retailcop.ca/files/dajigekobonu.pdfIn PDF document text
    • https://webmenuplus.com/images/file/18983269043.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/kelirifapap.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2fa4b1989---82480052890.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/rologizumilepof.pdfIn PDF document text
    • http://progetec.org/userfiles/files/linufodisowiforukazirim.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_off0000c839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC839 11096 bytes
SHA-256: e23534943ca09746bedaab0b14c10db292bcfecd7c59e8dafb98a88615e78711
font_01_sfnt_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 18384 bytes
SHA-256: 504c623d2c2fc9c27be4f9c045e4eeca0e12a707645ec90ebbed99e50016d0ef
font_02_sfnt_off00011116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11116 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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