Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06360af155f8b86…

MALICIOUS

PDF

69.4 KB Created: 2021-09-28 06:17:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 54960158edd9a81eacf53ba4bf7a0933 SHA-1: 72a5eda94a2e7df37c8ad457de6e2b54e05303a3 SHA-256: c06360af155f8b865a296f13cfc022d5ea0b9aee636e8a3586942baa1336172b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it's part of a link farm designed to obscure the true destination, with numerous links pointing to disposable hosting. The embedded URLs, such as http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/bugobateriduvisovolu.pdf, are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/bugobateriduvisovolu.pdf In PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/69059942595.pdfIn PDF document text
    • http://alsace.annuaire-regional.com/ckfinder/userfiles/files/75015091543.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/zadoxefevezabuzu.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/72188258212.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/wunofomevirofa.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/21584893155.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109192105234827.pdfIn PDF document text
    • http://www.rarlaw.net/siteuploads/editorimg/file/wepaziwugafalal.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/xawurudivumemaliraxobeves.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/c665173213f91b1dbd7685c3b8a7e168/puluremepozabepuxoratub.pdfIn PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/16/resojajebit.pdfIn PDF document text
    • http://newo.ru/files/files/16662576131.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/mifewibazewufipojudabago.pdfIn PDF document text
    • https://hometeamcorp.com/images/usr/zitiluwomumitabero.pdfIn PDF document text
    • http://abbwingslynnhaven.com/uploads/files/bizulitonaritulu.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/51295519818.pdfIn PDF document text
    • http://paneldeconsos.com/userfiles/file/kemuvo.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/xisosetime.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/nejeraverepigijiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ramen+guy+narutoPDF 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_off0000aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE1 10404 bytes
SHA-256: 6012428f5bccac64dc7ac87478440f39c5b4795c41a4fc61a9502676be3ae4ba
font_01_sfnt_off0000c671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC671 16576 bytes
SHA-256: 8d17e98438892b3f1b8ec9a1f6c78d20d48c51cf5945784bd4c0d2eaa8ad66b4
font_02_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1