Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf0eed1f8f3e8cde…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 00:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cf75cdcfb535ac7febafbdd5b37d3849 SHA-1: 20a182061af1dd9f2210632fa811c56892a1b9e4 SHA-256: cf0eed1f8f3e8cde512df8b9b50d87ab0755372298481b0c11ee976fffa0bc8c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for initiating malicious actions within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://nirmalujjwal.com/public/ckfinder/userfiles/files/vapipizarodonaxim.pdf In PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/neriluwebexuseki.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612fd31190e0f---vowadimosuxeb.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/48538661550.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/78133516588.pdfIn PDF document text
    • https://www.scmsgroup.org/ckfinder/userfiles/files/lonidixijenilikujewep.pdfIn PDF document text
    • http://excitechem.com/userfiles/file/75843935545.pdfIn PDF document text
    • http://thietkewebsite.btccorp.vn/uploads/files/xodasamatuvilafelolegelu.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16305193386756.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/kivukadewizaba.pdfIn PDF document text
    • http://bamor.org/userfiles/file/titarewezurogeg.pdfIn PDF document text
    • https://mauspro.net/upload/files/22859400184.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/86014075328.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/samijugeriroti.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/54314120335.pdfIn PDF document text
    • http://gruaszarate.com/ckfinder/userfiles/files/75716503742.pdfIn PDF document text
    • https://ce-mi.pl/uploads/userfiles/files/58872828974.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/64560910165.pdfIn PDF document text
    • http://ecolservizinettuno.com/userfiles/files/vokari.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hd+streamz+apk+free+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_off0000ab40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB40 10796 bytes
SHA-256: 3b6ab03ad0da524b2d71fc710ba92e7cf845d1c66253d197a58a215219fa5af0
font_01_sfnt_off0000c42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42A 16600 bytes
SHA-256: e4426cff7758b8ea0643ba55a0ad3565553798bcea3ace4761d15938600bb008
font_02_sfnt_off0000ee74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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