Malicious PDF — malware analysis report

Static analysis result for SHA-256 6244bccb4e1ca7b3…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 20:14:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 551fe15649653dfcedac249b20dd59b2 SHA-1: f7c7c63c2017e8bff6109b5c7daa3295c5c89d42 SHA-256: 6244bccb4e1ca7b3d87aeb9e30a088a5c1d14b25fc1664b9abb2a740372fa5b6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host a large number of links on disposable domains, likely to obscure malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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.
  • 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 http://indecomavo.pl/userimg/inc/jonefuwatokibide.pdf In PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/dujukuzidojowobi.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/gokakoweganarosemomalovu.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/pilap.pdfIn PDF document text
    • http://topaslt.com/userfiles/file/59770080966.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/161447d15c7c49---79506241320.pdfIn PDF document text
    • https://onderdurdu.com/upload/ckfinder/files/26766525303.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/6046623260.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/sokaluniwagu.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/sodupurizobagavex.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/59321513440.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/24687618300.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/foparo.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/ferasenazawez.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/7082379059.pdfIn PDF document text
    • http://metalzilemboeventi.com/userfiles/files/zozofugomumoxafuludasa.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136c9b303b92---52651602906.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/66796916780.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/98682635740.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/nufiporirejujoxag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=where+to+stream+promising+young+womanPDF 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_off0000da37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA37 19128 bytes
SHA-256: c6c04fb96948d2a15a62c7f4939095a8ee4432848c98deaa7f54c4043fcfd5a9
font_01_sfnt_off00010c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C56 10948 bytes
SHA-256: 6b1af18e89af5a6b009f4c4be9bcd67f090c038cb96cd677d739e5d00bfdaaf1
font_02_sfnt_off000125aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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