Malicious PDF — malware analysis report

Static analysis result for SHA-256 38957ddd59e1a505…

MALICIOUS

PDF

60.9 KB Created: 2021-09-23 01:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 874f9095d3e88c1fe822d744c4178106 SHA-1: 2f62c64f58ca96381545867cad1cf63385e3701f SHA-256: 38957ddd59e1a5051b076c8ff23d89726f01e62c4874c6acd3464c5e188467dd
124 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7678

Heuristics 4

  • 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
  • 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://philabc.ru/uplcv?utm_term=friends+reunion+episode+1+full+episode PDF link annotation
    • https://morabia.fi/images/file/nefasapakixowujiriz.pdfIn PDF document text
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/lilopekafaroxagelamofewi.pdfIn PDF document text
    • https://n-vv.dk/userfiles/file/vodalorot.pdfIn PDF document text
    • http://ultraljud.nu/bild/files/gomevulavawepopetod.pdfIn PDF document text
    • https://mgrenginiai.lt/ckfinder/userfiles/files/66061255183.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/96924256774.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/bubog.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/57131341467.pdfIn PDF document text
    • https://virker-ikke.dk/files/liwuxewo.pdfIn PDF document text
    • http://avesta-hmora.boj.se/uploads/userfiles/files/donapepazasisinabikosetir.pdfIn PDF document text
    • http://japhina.com/upload/file/63331827513.pdfIn PDF document text
    • http://4chan.ro/UserFiles/file/3801678620.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/62514105277.pdfIn PDF document text
    • https://geneolock.com/ckfinder/userfiles/files/37145425043.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/mituvu.pdfIn PDF document text
    • https://khotelmarket.com/FileData/ckfinder/files/20210914_1E72A192E93F057B.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/14361222092.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/56170665343.pdfIn PDF document text
    • http://labotinnghia.com/img/files/28181274008.pdfIn PDF document text
    • https://lanjutpt1.com/contents/files/85507853928.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/e5ff2f336239cbeac8e7c233785bb695/venepavaferos.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/feluwazusaserunomibob.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/96685624047.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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