Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f48849834039069…

MALICIOUS

PDF

85.7 KB Created: 2021-09-10 17:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cff31aa53b00b730d0ff6743c820c649 SHA-1: c96fd251fedf2974911f6b6927b98631b5021dfc SHA-256: 6f488498340390690983fa3b5b22aaaeb0f4d19e850c608a6e1650537e6f352e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/4e7755acda14c08493845dbc7aa5a897/zenepoge.pdf In PDF document text
    • http://studionegrelli.it/userfiles/files/92139143634.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/vazixifovegeboduma.pdfIn PDF document text
    • http://abarappresentanze.it/userfiles/files/lisexezarurovugatap.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/73102711003.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/39520715545.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/28185895036.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/nelalatalikid.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/wuroxibipafosojezodev.pdfIn PDF document text
    • https://grdr.org/paidel/ckfinder/userfiles/files/sonaturiwokakaduzujozen.pdfIn PDF document text
    • http://kapalishakti.com/ckfinder/userfiles/files/mefiseriv.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16131dd0a95c7d---sobawerebotisosabefudisop.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/xawozuxapebexomaz.pdfIn PDF document text
    • http://ciccioinpentola.com/userfiles/files/mojubowomuxumo.pdfIn PDF document text
    • https://contemporaryteas.in/admin/uploads/file/dumerejerikatamujuvagaz.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/60896953228.pdfIn PDF document text
    • http://lizhechem.com/upload/files/diwotoxekubixoli.pdfIn PDF document text
    • http://woodbridgeabw.com/uploads/files/47200401712.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210903141218.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/rifeselizagazixemaf.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132277479ce7---doxuweluwolunadasogot.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/fapepopikafew.pdfIn PDF document text
    • https://sua.vn/uploads/userfiles/file/58375783195.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/51608005886.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/pujakigafidigon.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/nukonorodulufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hrithik+roshan+full+movie+warPDF 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_off0000e2fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FE 20116 bytes
SHA-256: 6e46bee548a2b6e75ef416a2265d43e87ed4ded95d20b54ef5c86cc07e7810f4
font_01_sfnt_off00011831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11831 10812 bytes
SHA-256: c8765a07d94e39ad76740c3c1d805e684cc279b0b31f357503811c3e1f9ba116
font_02_sfnt_off000130fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1