Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e95910fa9e2898d…

MALICIOUS

PDF

83.1 KB Created: 2021-09-17 03:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 870b94330f47e34c6ccb953264f71ede SHA-1: f78db97f9c4eecc21575f451f031e7ed94681ea6 SHA-256: 7e95910fa9e2898d1bf13244d189518e2271eb59e5103bea516554e4f310bebc
176 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of PRC/3D content and multiple external URI heuristics further support the classification as a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://taiwancy.com/app/webroot/userfiles/files/musukawenuzerudedunab.pdf In PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614179f194524---wojikudaparosonofaza.pdfIn PDF document text
    • http://www.uds-myanmar.com/image/upload/File/38842925036.pdfIn PDF document text
    • http://vanguardhungary.hu/userfiles/file/62185422685.pdfIn PDF document text
    • https://livnica-metalurg.com/images/pages/file/82295214910.pdfIn PDF document text
    • https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/famobapufagemaletatel.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613994f4494e5---15293334143.pdfIn PDF document text
    • http://etre-belle.su/images/file/75799959451.pdfIn PDF document text
    • https://doctmcooper.com/userfiles/files/57113557994.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/bofalileluko.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/geviw.pdfIn PDF document text
    • http://intertravel.hu/_user/file/99468963450.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff84491f7c---tigikededijotanipexoxajo.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/46b63f07df813c5faae00c50281bbda4/47515839888.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/18274741806.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/pomitowepavi.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/12942542890.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1613d828f15125---piwuvexabetokeru.pdfIn PDF document text
    • http://k1a.ru/images/files/file/33812064431.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/25781418973.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/wafibowarunokobazuzudo.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/1462464884.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/7076983129.pdfIn PDF document text
    • http://atomleasing.ru/media/File/12161124253.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=tubemate+video+mp3+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_off0000df4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 18076 bytes
SHA-256: 08a4abb0e6058c5f74fbe14ef168babbe675d9fb4bdd7608d62ca69ef64e6efb
font_02_sfnt_off0001262b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 10812 bytes
SHA-256: 4fc1d309a38dc80528745b071d0c0f19e4e6b97b2e0b9c6d4e1112069ef33876

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