Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea22dde2c24fa69d…

MALICIOUS

PDF

69.8 KB Created: 2021-09-26 23:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6c8e5b57a82e48efe3d6ead695cd534f SHA-1: f9c465502b9090382b6c446a90a81585f3eb983d SHA-256: ea22dde2c24fa69d8a2e08d5ae0b224c06b81d0ae74cc4c384e4b0204affdea4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to PDF files hosted on various domains, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the embedded links point towards an attempt to distribute malware or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://lesartsdansmonjardin.com/userfiles/file/20210902145254.pdf In PDF document text
    • https://infrastone.com/userfiles/files/xulodovipuk.pdfIn PDF document text
    • http://rentappli.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/98340651291.pdfIn PDF document text
    • http://coolscape.info/images/files/18700698025.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/10017669709.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613900d548acd---61834465931.pdfIn PDF document text
    • https://ms1oke.com/contents/files/9051287894.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/wijurusewaguwomutawe.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/56482098767.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/48671156910.pdfIn PDF document text
    • https://mabuksusu2.com/contents/files/navano.pdfIn PDF document text
    • http://knipia.com/userfiles/file/35305795581.pdfIn PDF document text
    • http://garderoba.sk/images/_file/fogezijovolatizurumedu.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/xikitiwivorafofusadika.pdfIn PDF document text
    • https://kitapkapla.com/upload/ckfinder/files/dereretujo.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/18339574665.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/35339502824.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1613433526b124---8960171690.pdfIn PDF document text
    • https://kueapem.com/contents/files/12725239358.pdfIn PDF document text
    • http://www.chubsorn.com/file/files/gigedozidizom.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/89872323033.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/62560374461401c8b1c06b.pdfIn PDF document text
    • http://radyoislam.com/resimler/files/28262735301.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/manizawibaka.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/xiwegasuz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=inshot+pro+ios+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_off0000b3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BD 10392 bytes
SHA-256: f090d961b135ab6d0c1e2b84b56d88ac17c935189c518ad105d20f2018b097b0
font_01_sfnt_off0000cb2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 15176 bytes
SHA-256: de85d23f7a27660ef9235d04e764ce485a8ec8e4d7d1454738749c98cc0bfb76